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Amrasca (Quartasca) curvata n. sp. (Figures 10 A–L) Description. Length of male 2.6 mm. Ground color pale yellow, crown with conspicuous pair of black preapical spots; pronotum and mesonotum each with median anterior white spot and pair of lateral white spots; forewing with small brown spot in inner anteapical cell, remainder pale hyaline except for diffuse yellow longitudinal band along commissure. Hind tibia formula PD:AD:AV 10:9:4. Male 2S apodemes well separated at base, enclosing ovoid area, extended slightly beyond posterior margin of sternite III, apices rounded. Male pygofer apex triangular with oblique preapical row of setae submedially in addition to posterodorsal setal row, basolateral setae absent; ventral appendage very slender and nearly straight in lateral view, apex evenly tapered, needle-like and extended well beyond lobe apex, curved slightly laterad in ventral view. Anal hook very short, slender, curved anteromesad with blunt apex. Pregenital sternite with posterior margin truncate with small v-shaped median notch. Subgenital plate approximately 1.5X longer than pygofer, gradually broadened from base to distal third in lateral view, then dorsal margin tapered to narrowly rounded apex; setal group A consisting of few very fine, inconspicuous setae near base; group B setae very small and scattered; group C with 11–12 macrosetae in double row basally narrowing to single row distally; group D with single dorsal row of long, fine setae extended from distal fourth around apex and continuing along ventral margin to midength; Style apophysis evenly curved and tapered to acuminate apex, with few preapical lateral setae and 7–8 small preapical teeth posteromesally. Connective arms widely divergent, slightly longer than stem. Aedeagus with preatrium approximately twice as long as shaft; shaft very short and slender, base in lateral view forming obtuse angle with preatrium; shaft tubular, evenly curved dorsad, slightly tapered to blunt apex in posterior view. Etymology. The species name, a Latin adjective, refers to the distally curved pygofer appendage. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao 21.4589ºN 105.6479ºE, 970m, 10 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-5-2 (VNMN). Paratypes: 1 male, 5 females, VIETNAM: Vinh Phuc, Tam Dao 21.4561ºN 105.6501ºE, 983m, 10 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-7-1 (INHS). Notes. This species resembles the type species of the subgenus, A. (Q.) czerwcowa (Dworakowska), in coloration but differs in having a pair of conspicuous black spots on the crown and in the male genitalia, including the more elongate and laterally curved pygofer appendage, the short, slender anal hook, and the very short and slender aedeagal shaft. The 3S apodemes also have a different shape., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 267-269, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088

Uzelina (Uzelina) vietnamensis sp. n. (Figures 3, 11L) Description. Length of male 4.0 mm. Coloration stramineous, dorsum heavily marked with orange, brown and white; venter mostly black. Crown with four incomplete longitudinal orange stripes submedially, continuing onto pronotum but less distinct posteriorly; pronotum with two transverse white bands, one at middle and one on posteri- or margin, area between bands dull yellow with minute brown spots irregularly arranged; mesonotum and scutellum mostly yellow with minute brown spots; forewing mostly hyaline with very indistinct transverse yellow and white bands, minute brown spots concentrated in clavus and in inner anteapical cell, larger brown spots in apical cells, along costal margin and near base of clavus, veins mostly pale yellow not contrasting with adjacent membrane. Crown in dorsal view slightly less than half as long as pronotum, anterior margin broadly rounded, only slightly longer medially than next to eye. Pronotum with lateral margin approximately half as long as eye. Front femur AM1 near ventral margin, IC with 11 setae extended over distal two thirds, AV without setae in basal half; tibia without dorsal macrosetae, AV with numerous close-set macrosetae, PV without conspicuous setae. Hind tibia formula PD:AD:AV 20:11:17; tarsomere I pecten with 3 platellae. Male pygofer lobe subquadrate, slightly longer than tall, with posterodorsal preapical group of macrosetae and group of smaller stout setae more ventrad at apex. Segment X relatively short and broad, well sclerotized laterally but membranous dorsally. Valve broad and subangulately produced posteriorly, much wider than long. Subgenital plate triangular with bluntly angulate apex, longer than wide, with scattered short, fine setae more or less evenly distributed over ventral surface. Style short and broad, preapical lobe obtusely angulae, apophysis slender, extended mesad then hooked posterolaterad, apex acuminate. Connective with anterior arms widely divergent, stem slender and elongate, ca. twice as long as arms, apex slightly expanded and truncate. Aedeagus without preatrium, atrium no wider than shaft in posterior view; dorsal apodeme short, simple, truncate dorsally in posterior view; shaft evenly curved dorsad in lateral view, somewhat depressed, with paired lateral flanges giving rise to pair of long, slender preapical spines extended dorsolaterad, apex digitiform, weakly sclerotized; gonopore on posterior surface near apex. Etymology. The species name refers to the country of origin. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 5 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-1 (INHS). Notes. The dorsal color pattern of this species, with bright orange maculae on the crown and pronotum, closely resembles that of U. thaloriensis Sharma, 1986. The new species differs mainly in the aedeagus, which has a pair of preapical lateral spines. However, the new species will key to Vulturnus Kirkaldy in the key to Indian Penthimiini by Shobharani et al. (2018) because the lateral frontal sutures extend to the ocelli. The new species is tentatively placed in the nominotypical subgenus of Uzelina Melichar based on the similarity of the male genitalia to those of the type species (U. laticeps Melichar) as illustrated by Linnavuori (1977). Species from the Oriental region currently placed in Vulturnus do not appear to be congeneric with the type species of that genus, V. vulturnus Kirkaldy from Australia, but rather more closely resemble species of Reticuluma Cheng & Li due to their reticulate dorsal color pattern (absent in Australian species of Vulturnus). A comprehensive revision of Vulturnus is needed.

Tribe Cicadellini Atkinsoniella albipenna Yang, Meng & Li, 2017 (Figure 11A) Material examined. 1 male, 1 female, VIETNAM: Vinh Phuc, Tam Dao, 21.4577ºN 105.6494ºE, 965m, 10 July 2019, C.H.Dietrich, Hg vapor light, VN19-10-1. 1 male, 4 females, VIETNAM: Vinh Phuc, Tam Dao, summit trail, 21.4622ºN 105.6473ºE, 970m 11 July 2019, C.H.Dietrich, sweeping forest understory, incl. bamboo, VN19-6-1 (INHS). Notes. This species was described from southern China. It is here recorded from Vietnam for the first time. Atkinsoniella xanthovena Yang & Li, 2002 (Figure 11B) Material examined. 2 males, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN; 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3. 1 male, 2 females, VIETNAM: Vinh Phuc, Tam Dao, 21.4533ºN 105.6480ºE, 942m, 12 July 2019, C.H.Dietrich, sweeping forest edge, VN19-9-2 (INHS). Notes. This species was described from southern China. It is here recorded from Vietnam for the first time. Bothrogonia hamata Yang & Li, 1980 (Figure 11C) Material examined. 1 male, VIETNAM: Vinh Phuc, Tam Dao, 21.4509ºN 105.6325ºE, 741m, 13 July 2019, C.H.Dietrich, sweeping understory in 2º, pine forest, VN19-8-2 (INHS). Notes. This species was described from southern China. It is here recorded from Vietnam for the first time.

Sychentia vietnamensis n. sp. (Figures 6 A–F, 11Q) Description. Length of male 7.0 mm. Coloration white, dorsum heavily marked with complex symmetrical pattern of pale brown spots and lines forming pair of prepical diamond-shaped transcommissural marks preapically and numerous false veins on forewings. Leg chaetotaxy and forewing venation as described for S. hainanensis Wei & Zhang (2013). Male pygofer dorsal margin deeply emarginate near midlength, distal part of lobe with darkly pigmented dorsal falcate portion contrasting with paler ventral area. Connective with subequal to length. Style apophysis sinuate with distal part curved mesad and slightly emarginate subapically. Aedeagus in lateral view with shaft ventral margin distinctly arcuate near base then straight through rest of length, parallel sided in lateral view. shaft in posterior view very slender and parallel sided with scattered indistinct lateral teeth, apex weakly expanded and poorly sclerotized. Etymology. The species name refers to the country of origin. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP, park rd. km 29, 20.3363ºN 105.6094ºE, 350m, 8 July 2019 C.H.Dietrich, Hg. vapor light, VN19-4-1 (VNMN). Notes. This species is very similar to S. hainanensis, described from Hainan Island, China. Both species are known from single male specimens. Further collecting is needed to confirm that these two populations represent distinct species. The Vietnamese population is here treated as a distinct species based on the following morphological differences: size distinctly smaller (length of male 7.0 mm versus 7.7 mm in S. hainanensis); pygofer dorsal margin more deeply emarginate; connective slightly wider than long (distinctly longer than wide in S. hainanensis); aedeagus with posteroventral margin distinctly arched near base and nearly straight and parallel-sided for rest of length in lateral view (evenly curved and distinctly tapered in S. hainanensis)., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 258, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Wei, C. & Zhang, Y. (2013) Sychentia hainanensis sp. n., the first record of the genus from China, with notes on the morphology and biogeography (Hemiptera: Cicadellidae). Zootaxa, 3636 (1), 196 - 199. https: // doi. org / 10.11646 / zootaxa. 3636.1.9"]}

Scaphoidella albopunctata n. sp. (Figures 5 H–S) Description. Length of male 4.9 mm. Dorsum mostly orange-brown; head with thin band at anterior margin, one thick and one thin band preapically on crown separated by narrow white areas, posterior margin broadly white, face orange dorsally, pale stramineous ventrally. Pronotum with white transverse arcuate band at midlength, posterior margin white narrowly bordered anteriorly with brown; exposed part of mesonotum orange, scutellum mostly white. Forewing veins mostly dark brown in apical 2/3, corium with three round white spots bordered with brown near middle and larger white area interrupted by veins at bases of apical cells near apex; clavus with white transcommissural spot bordered with brown near midlength, two more diffuse white spots near base, apex dark brown. Venter and legs mostly stramineous with bases of some macrosetae and tips of hind tibia and first two tarsomeres black. Crown distinctly produced into acute angle anteriorly, median length approximately 0.75X basal width between eyes. Forewing outer anteapical cell tapered to point apically, s crossvein absent. Front femur AM1 near ventral margin, IC row with 11 fine setae, AV with 4 very short, stout setae; tibia rows AD and PD with 1 and 4 macrosetae, respectively, AV with numerous macrosetae, PV without distinct setae. Hind tibia formula PD:AD:AV 16:9:14, tarsomere I pecten with 3 platellae. Male pygofer moderately long, apex of lobe bluntly angulate. Subgenital plate as long as pygofer, lateral margin convex basally, concave distally in ventral view, apex digitiform, with row of 8 macrosetae laterally, long fine setae sparsely distributed along lateral margin. Style apophysis relatively long, straight and parallel-sided through most of length, with obtuse lateral subapical lobe bearing tuft of fine setae; apex short, slender and hooked laterad. Connective U-shaped and partly fused to base of aedeagus but with joint flexible. Aedeagal preatrium flexibly articulated to base, processes stout, tubular through most of length, somewhat arcuate near base in lateral view then straight, tapered and compressed distally with mesal surfaces somewhat excavated, only slightly divergent in ventral view; shaft compressed, much narrower than atrium in posterior view; in lateral view curved dorsad, slightly narrower near middle than at base and apex, apex rounded; shaft longitudinally cleft ventrally but entire at apex in ventral view; gonopore preapical on posterior surface. Female sternite VII with posterior margin produced medially with projection subquadrate. First valvula moderately slender with dorsal sculpture imbricate, apex tapered to sharp point. Second valvulae gradually but slightly broadened toward midlength then gradually tapered to bluntly pointed apex; dorsal teeth restricted to distal half, larger teeth separated by smaller denticles. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3578ºN 105.5966ºE, 560m, 5 July 2019, C.H.Dietrich, sweeping in forest, VN19-3-1 (VNMN). Paratypes: 1 male, 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN, 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3 (INHS). Notes. This species is easily distinguishable from other described species of the genus by the distinct white spots outlined with dark brown on the forewing. It is also unusual among known Scaphoidella Vilbaste in having the aedeagal preatrium narrowly and flexibly attached to the atrium. Other known species apparently lack this flexible joint between the atrium and the process-bearing preatrium. In this respect, the new species seems to represent a transitional form between leafhoppers that have the aedeagal processes solidly attached to the base of the aedeagus and those with the processes more closely associated with the connective (e.g., Scaphoideus Uhler). Scaphoideus albomaculatus Li, 1990 Etymology. The species name refers to the white spots on the forewing. Material examined. 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3578ºN 105.5966ºE, 560m, 8 July 2019, C.H.Dietrich, sweeping in forest, VN 19-3-2. Notes. This species was previously recorded from southern China (Guizhou). It is here recorded from Vietnam for the first time. Scaphoideus shovelaedeagus Li, Song & Song, 2007 (Figure 11O) Material examined. 4 males, 1 female, VIETNAM: Vinh Phuc, Tam Dao, 21.4561ºN 105.6501ºE, 983m, 10–13 July 2019, C.H.Dietrich, Malaise trap in forest opening, VN19-7-2 (INHS). Notes. This species was previously recorded from southern China (Yunnan). It is here recorded from Vietnam for the first time. Scaphoideus maai Kitbamroong & Freytag, 1978 (Figure 11P) Material examined. 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3; 1 female, same data except 5 July 2019, VN 19-2-1 (INHS). Notes. This species was previously recorded from Thailand and China. It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 256-258, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Li, Z. Z. (1990) Four new species of the genus Scaphoideus from China (Homoptera: Euscelidae). Acta Entomologica Sinica, 15, 464 - 470.","Li, Z. Z., Song, Y. H. & Song, Q. Z. (2007) Descriptions of four new species of the genus Scaphoideus Uhler from Yunnan Province, China (Hemiptera, Cicadellidae, Euscelinae). Acta Zootaxonomica Sinica, 32 (3), 680 - 685.","Kitbamroong, N. A. & Freytag, P. H. (1978) The species of the genus Scaphoideus (Homoptera: Cicadellidae) found in Thailand, with descriptions of new species. Pacific Insects, 18, 19 - 31."]}

Carinata arcuata n. sp. (Figures 7 K–R, 11U) Description. Length of male 5.5 mm. Coloration bright yellow tinged with orange; head with large median anterior preapical black spot on crown and smaller brown spot on frontoclypeus below each antenna; without additional dark markings. Head with crown acutely produced, median length ~1.3X longer than that of pronotum. Front femur AM1 near midheight, IC with 10 fine setae, AV with 4 somewhat larger setae nearly continuous with IC row, PV with 9 short setae near midlength, stout distal seta absent; tibia with numerous short setae in rows PD, AD and PV, AV with numerous long macrosetae, distinct accessory row of 4 setae present between AD and AV. Hind tibia formula PD:AD:AV 26:13:15; tarsomere I pecten with 3 tapered setae, Male pygofer slightly longer than tall, produced posterodorsally with posteroventral margin broadly concave, surface with few short fine setae scattered over distal half; ventral appendage arising near midlength and extended posterodorsad along ventral margin of lobe, acuminate with minute dorsal preapical spine, terminating slightly short of lobe apex. Segment X long, tubular, well sclerotized and darkly pigmented, without processes. Subgenital plate slightly longer than pygofer, lateral margin moderately expanded near midlength then gradually tapered to rounded apex, with submedial ventral row of 2–3 macrosetae in basal half, distal half with longitudinal band of shorter, stout setae medially and lateral band of long, fine setae. Style preapical lobe poorly developed, apophysis curved slightly laterad then abruptly bent mesad, footlike apex with heel rounded and toe relatively short and blunt tipped. Connective Y-shaped, short and narrow with stem approximately as long as anterior arms. Aedeagus with atrium forming bowl-like structure enclosing shaft, somewhat heart-shaped in posterior view; shaft elongate, slender, tubular, slightly but evenly arcuate and gradually tapered from base to apex; apex strongly bent anterad and terminating in pair of short distal spines; gonopore preapical on posterior surface. Etymology. The species name refers to the arcuate ventral margin of the male pygofer lobe. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP, park rd. km 29, 20.3363ºN 105.6094ºE, 350m, 8 July 2019 C.H.Dietrich, Hg. vapor light, VN19-4-1(VNMN). Paratype, 1 female, same data (INHS). Notes. This species is similar to Carinata midfasciata Wang & Li, described from China and recently recorded from India (Viraktamath & Webb 2018), but differs in having the male pygofer lobe concave posteroventrally with a much shorter and more slender process, the subgenital plate with fewer macrosetae and with a lateral preapical band of shorter setae, the style preapical heel rounded, the aedeagal atrium short and extended around the base of the shaft, and the aedeagal shaft evenly tapered with the distal recurved spines more slender and the gonopore on the posterior preapical surface. Onukia albiclypeus Li & Wang, 1993 Material examined. 5 males, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3; 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP, park rd. km 29, 20.3363ºN 105.6094ºE, 350m, 8 July 2019 C.H.Dietrich, Hg. vapor light, VN19-4-1 (INHS). Notes. This species was described from southern China and more recently recorded from India (Viraktamath & Webb 2018). It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 262-263, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Viraktamath, C. A. & Webb, M. D. (2018) Revision of the evacanthine leafhoppers (Hemiptera: Cicadellidae: Evacanthinae) of the Indian subcontinent. Zootaxa, 4386 (1), 1 - 78. https: // doi. org / 10.11646 / zootaxa. 4386.1.1","Li, Z. Z. & Wang, L. M. (1993) Description of Taperus with three species (Homoptera: Cicadellidae: Evacanthinae) from China. Journal of Guizhou Agricultural College, 12, 49 - 54."]}

Traiguma hamocauda n. sp. (Figures 8 I–Q, 11W) Description. Length of male 11.3 mm; female 15.5 mm. Overall coloration dark reddish brown with margins of most sclerites and venter somewhat lighter; setae clothing most body surfaces dark brown, pale along lateral mar- gin of pronotum and on tiny patches in inner and central anteapical cells of forewing; abdomen uniformly brown. Head with crown approximately three times longer than basal width between eyes; crown between eyes strongly depressed and concave; median longitudinal carina weakly elevated; ocelli elevated, situated slightly anteromesad of eyes. Anterior process nearly straight, extended anterodorsad, slightly broadened at midlength then slightly tapered toward obliquely rounded apex in lateral view, with single short tubercle preapically on each side; in dorsal view strongly constricted at midlength then widened to equal width between eyes near apex; dorsal surface deeply concave with large tubercle medially at base of broadened preapical area; apex diamond-shaped. Exposed part of mesonotum and scutellum together ~1.7X longer than pronotum, scutellum strongly convex and elevated above forewing base. Forewing apex subtruncate. Hind femur macrosetal formula 2+1+1, preapical setae relatively small but stout; tibia rows PD, AD and AV with 14, 9 and 17 macrosetae, PV with numerous fine setae in basal three fourths and 4 macrosetae near apex; tarsomere I with two plantar rows of simple setae, pecten with 5 platellae. Male pygofer incised to base dorsally, lobe in lateral view 1.5X longer than wide, apex obliquely truncate; ventral appendage stout, distal portion straight and parallel-sided in ventral view, apex terminating in sharp mesally directed spine. Style apophysis vestigial, short, rounded with few elongate setae. Connective narrow at base, broadened distally, anterior arms very short. Aedeagus simple, U-shaped, preatrium and dorsal apodeme short, shaft curved dorsad and tapered in lateral view to acute apex, with few indistinct denticuli on anterior surface and paired posterolateral ridges, in posterior view somewhat ovoid; gonopore large, preapical on posterior surface. Etymology. The species name combines the Latin words “hamo” (hook) and “cauda” (tail), and refers to the hooked ventral appendages of the male pygofer. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4509ºN 105.6325ºE, 741m, 13 July 2019, V. D. Nguyen, sweeping understory in 2º, pine forest, VN 19-8-2 (VNMN). Paratype: 1 female, same data as holotype (INHS). The type series was swept from small, broadleaved trees in the understory of a secondary pine forest. Notes. Externally, the new species resembles the type species, T. nasuta Distant, in having the apical process of the head expanded distally but the new species is readily distinguished by the weakly elevated median longitudinal carina of the crown, the nearly uniform dark brown coloration of the dorsum, and the male genitalia. The three previously known species of the genus lack a ventral appendage on the male pygofer. Pygofer appendages are present in T. hamocauda and also occur in several other hylicine genera including Balala Distant, Hatigoria Distant, Kalasha Distant, Nacolus Jacobi and Sudra Distant, all of which differ from Traiguma in the structure of the head. The new species also differs from the genus description provided by Viraktamath & Webb (1991) in having different numbers of macrosetae on rows PD and AV of the hind tibia. Thus, placement of the new species in Traiguma must be considered tentative pending a thorough comparative analysis of the abovementioned genera. If the generic placement is correct, then the new species represents a considerable range extension for the genus, representing the first record outside the Indian subcontinent.

Phlogothamnus pseudorugosus n. sp. (Figures 5 A–G) Description. Length of male 4.4 mm. Overall color pale ochraceous. Crown apex cream colored, disc with pattern of fused dark brown lines enclosing two round orange spots posteromesad of ocelli and pair of larger orange areas more posterad; face with distinct black macula just above antennal pit and smaller black spot just below ocellus. Pronotum light brown with indistinct fuscous markings. Mesonotum and scutellum with symmetrical brown, orange and yellow markings. Forewing unmarked except three small fuscous spots along commissural margin of clavus. Legs unmarked except for darker bases of macrosetae. Front femur AM1 near ventral margin, IC row with 14 fine setae, AV with ~15 very short, stout setae; tibia rows AD and PD with 1 and 4 macrosetae, respectively, AV with numerous macrosetae, PV without distinct setae. Hind tibia formula PD:AD:AV 18:10:17, tarsomere I pecten with 3 platellae. Male pygofer with posteroventral process stout, arising as continuum of well-sclerotized ventral submarginal ridge, divergent from margin of lobe, curved dorsad and somewhat broadened medially then tapered to acuminate tip but not reaching posterodorsal corner of lobe. Style apophysis large, nearly straight, expanded near base and gradually tapered to bluntly angulate tip, surface distinctly denticulate, mesal margin with 5–6 prominent preapical teeth. Connective relatively short and broad, V-shaped, stem absent. Aedeagus without preatrium, atrium same width as shaft in posterior view, dorsal apodeme constricted below truncate apex in posterior view; shaft moderately long, curved slightly dorsad, tubular, slightly tapered through most of length, gonopore on short posteroapical extension. Etymology. The species name refers to the similarity of this species to P. rugosus Li. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3 (VNMN). Paratype, 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance 20.2501ºN 105.7145ºE 156m, 3 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-1-2 (INHS). Notes. This species resembles P. rugosus Li, described from China, but differs in having the pygofer appendage shorter, the aedeagal shaft longer and narrower, the style with prominent teeth preapically and the connective without a stem. Platyretus gangeticus Viraktamath & Webb, 2008 in Viraktamath , et al., 2008 (Figure 11N) Material examined. 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 5 July 2019, C.H. Dietrich, sweeping along rd., VN 19-2-1; 2 males, VIETNAM: Ninh Binh, Cuc, Phuong NP center 20.3578ºN, 105.5966ºE, 560m, 5 July 2019, C.H.Dietrich, sweeping in forest, VN 19-3-1. Notes. This species was previously recorded from Bangladesh, India and southern China. It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 255, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Viraktamath, C. A., Webb, M. D., Dai, W. & Zhang, Y. (2008) A review of the Oriental grassland leafhopper genus Platyretus Melichar (Hemiptera: Cicadellidae: Deltocephalinae). Zootaxa, 1696, 37 - 47. https: // doi. org / 10.11646 / zootaxa. 1696.1.3"]}

Xenovarta lunata n. sp. (Figures 6 G–O, 11R) Description. Length of male 6.5 mm. Overall coloration green with bright orange markings. Crown pale yellow with continuous broad orange band along anterior margin between eyes. Pronotum with longitudinal stripes obsolete. Crown length 2.3X basal width between eyes; anteclypeus approximately parallel sided. Front femur row IC with 9 relatively stout setae extended over more than half length of femur, AV with 13 very short, stout setae; tibia rows AD and PD with 1 and 9 macrosetae, respectively, AV with numerous macrosetae, PV with 3 macrosetae. Middle femur with numerous very short, stout AV setae. Hind tibia rows PD, AD and AV; with 24, 12 and 20 macrosetae, respectively; tarsomere I pecten with 3 platellae. Front femur AM1 near midheight, IC with 10 long setae, AV with ~14 very short, stout setae; tibia rows AD and PD with 1 and 8 macrosetae respectively, AV with numerous close-set macrosetae, PV with 4 short setae. Hind tibia formula PD:AD:AV 20:12:21; tarsomere I pecten with 3 platellae. Male 2S apodemes slender, divergent and capitate, extended to posterior margin of sternite III. Pygofer longer than high in lateral view, ventral margin of lobe with acute emargination just beyond midlength, macrosetae restricted to small preapical dorsal group, inner wall with numerous conspicuous setae posterodorsally. Segment X extended to pygofer apex. Subgenital plates extended to pygofer apex, separate from each other but fused to valve, quadrate, with few lateral macrosetae and many macrosetae along truncate apices, apex of each plate with short dorsal tooth. Style preapical lobe short and acute, apophysis greatly enlarged, extended posterad, bent laterad at midlength then curved slightly posteromesad in ventral view, conspicuously denticulate, apex rounded. Connective loop-shaped, stem absent, arms bowed laterad but closely appressed anteriorly. Aedeagus with dorsal apodeme loop-shaped, shaft straplike, slender, curved dorsad; apex with pair of asymmetrical processes arising distad of gonopore, larger process extended anterolaterad to left, sickle-shaped, evenly curved ventrad then dorsad and broadened in middle; smaller more distal process extended dorsad then bent to left; gonopore preapical on posterior surface. Etymology. The species name is an adjective formed from the Latin word “lunato” (crescent) referring to the crescent-shaped preapical spine of the aedeagus. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4589ºN 105.6479ºE, 970m, 10 July 2019, C.H.Dietrich, sweeping along forest edge, VN19-5-1 (VNMN). 1 male paratype (with aedeagus broken), VIETNAM: Vinh Phuc, Tam Dao, 21.4509ºN 105.6325ºE, 741m, 12 July 2019, C.H.Dietrich, sweeping understory in 2º pine forest, VN19-8-1 (INHS). Notes. This species is very similar to X. ankusha Viraktamath 2004, described from southern China, which it closely resembles in overall appearance including head shape, color pattern and in the structure of the subgenital plates. The new species differs in having the ventral margin of the pygofer lobe strongly emarginate preapically with a broad ventroapical lobe, and the aedeagus with the left process much larger, expanded medially and bladelike, and the distal process curved toward rather than away from the left process., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 258-260, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Viraktamath, C. A. (2004) A revision of the Varta - Stymphalus generic complex of the leafhopper tribe Scaphytopiini (Hemiptera: Cicadellidae) from the Old World. Zootaxa, 713 (1), 1 - 47. https: // doi. org / 10.11646 / zootaxa. 713.1.1"]}

Tenompoella vietnamensis n. sp. (Figures 2 H–U, 11J) Description. Length of male 8.2 mm. Overall color stramineous tinged with green, with bright orange markings on head and thorax. Crown orange except narrow anteromedial part and pair of posterolateral spots, eyes and antennal ledges orange, face unmarked. Pronotum with posterior margin and pair of incomplete submedial longitudinal stripes orange. Mesonotum and scutellum orange laterally, basal triangles fuscous. Forewing with costal and commissural margins orange, veins mostly dark brown, apex with broad fuscous marginal band and row of fuscous preapical spots, one in each apical cell, some other cells also with fuscous medial spots. Front and middle tibiae orange, hind tibia orange at base, middle femur with fuscous spot at apex of anterior surface. Front femur row IC with 12 fine setae, AV with two moderately long, stout setae; tibia rows AD and PD with 1 and 4 macrosetae respectively, AV with numerous macrosetae, PV with 3 macrosetae. Middle femur AV with 4 stout setae. Hind tibial rows PD, AD and AV with 21, 11 and 20 macrosetae, respectively; tarsomere I pecten with 4 platellae. Male pygofer quadrate in lateral view, taller than long, macrosetae numerous, appendages absent. Segment X well sclerotized dorsally but relatively short. Valve sharply triangular, wider than long. Subgenital plate triangular, longer than wide, with lateral margin concave distally, with lateral row of macrosetae along middle third, apex weakly pigmented and digitiform, fine setae short and sparse. Style preapical lobe large, acutely angled, apophysis evenly curved laterad, evenly tapered to pointed apex, without denticuli. Connective very short, broad, stem absent, arms widely divergent. Aedeagus widely separated from connective, attached by thin membrane, dorsal apodeme large, taller and broader than shaft, with paired lateral and dorsal arms in posterior view. Shaft simple, tubular, slen- der, tapered and curved slightly dorsad, with pair of slender processes arising ventrally near base and extended along shaft, surpassing shaft apex; gonopore apical. Female sternite VII with posterior margin weakly trilobed, median lobe longer and narrower than lateral lobes, with pair of brown maculae submedially. First valvula moderately slender, dorsal sculpture strigate, continuous with ventral sculpture near apex. Second valvulae moderately slender and parallel-sided through most of length, with prominent dorsal tooth before midlength and series of close-set somewhat rounded triangular teeth in distal third. Etymology. The species name refers to the country of origin. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3578ºN 105.5966ºE, 560m, 5 July 2019, C.H.Dietrich, sweeping in forest, VN19-3-1 (VNMN). Paratypes: 1 female, same data as holotype; 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP, park rd. km 29 20.3363ºN 105.6094ºE, 350m, 8 July 2019 C.H.Dietrich, Hg. vapor light, VN19-4-1 (INHS). Notes. The new species described here agrees closely with the description and illustrations of the genus and its type species provided by Zhang & Webb (1996). The structure of the male genital capsule and genitalia of the new species are very similar to those of the type species except for two important differences: the connective of the new species is short, broad, and lacks a pair of posterior processes and the aedeagus has a pair of elongate processes fused to the base of the shaft. In contrast, Tenompoella difficilis (Walker) has paired processes on the apex of an elongate connective but no processes on the aedeagal shaft. This difference might be used to justify placing the new species in a separate genus. However, we note that some other genera of Cicadellidae (e.g., the Paleotropical paralimnine genus Nicolaus Lindberg and the Neotropical cicadelline genus Diestostemma Amyot & Serville) include different species that have the basal processes of the aedeagus either fused or separated from the shaft. We consider Tenompoella to represent an additional case in which this normally conservative character shows plasticity among otherwise morphologically similar species. In both species the aedeagus is dissociated from the connective, the two structures being attached to each other by a membrane, as occurs in some other species of Paraboloponina (e.g., Parabolopona Matsumura, Omanellinus Zhang, Forficus Qu) as well as in some genera of Scaphoideini (e.g., Scaphoideus Uhler).

Amrasca (Quartasca) excavata n. sp. (Figures 10 M–W) Length of male 2.9 mm. Ground color dull orange-yellow with white and dark brown markings. Crown with white median line extended from base onto face to apex of anteclypeus, pair of oblique white lines adjacent to eyes on crown and another on frontoclypeus; pronotum, mesonotum and scutellum each with white median anterior spot and pair of white anterolateral spots, lateral pronotal spots each enclosing small brown dot; forewing with some faint brown irroration and round brown medium-sized spot in inner anteapical cell; venter and legs pale yellow. Hind tibia formula PD:AD:AV 10:9:4. Male 2S apodemes, parallel-sided, well separated at base, enclosing rectangular area, extended slightly beyond posterior margin of sternite III, apices obliquely rounded. Pregenital sternite with posterior margin broadly bilobed with v-shaped median notch. Pygofer lobe triangular with preapical oblique submedial row of setae in addition to apical group, basolateral setae absent; ventral appendage in lateral view straight, slender, extended along posteroventral margin of lobe and only slightly surpassing lobe apex, abruptly narrowed and excavated medially near apex with slight preapical median lobe. Anal hook very short, slender, tapered and curved mesad. Subgenital plate very long and slender, nearly twice as long as pygofer, more or less parallel-sided in lateral view through most of length, apex narrowly rounded; setal group A consisting of dense group of moderately long, fine setae; group B with single row of short, fine setae; group C with 16–17 macrosetae in single row except two pairs at base; group D with single row of long, fine setae extended around apex at distal fourth. Style apophysis evenly tapered and curved laterad, apex acuminate, with 6 preapical posteromedial teeth and few lateral setae more basad. Connective approximately as long as wide, stem triangular, anterior arms short and widely divergent. Aedeagus with preatrium approximately as long as shaft; shaft in lateral view very slender, base forming right angle with preatrium posteriorly, curved dorsad and slightly sinuate near tapered apex, in posterior view slightly tapered to rounded apex. Etymology. The species name, a Latin adjective, refers to the preapically excavated male pygofer appendage. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance 20.2501ºN 105.7145ºE 156m, 7 July 2019, C.H.Dietrich, Hg. vapor light, VN19-1-6 (INHS). Notes: This species resembles the type species of the subgenus in coloration but differs in having the ventral appendage of the pygofer abruptly narrowed and excavated preapically, the anal hook much smaller, and the aedeagus with the shaft base forming a right angle with the preatrium and the apex sinuate in lateral view. The 3S apodemes also have a different shape. Flaviata furcata Xu, Lu & Qin, 2018 Material examined. 1 male, 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 5–8 July 2019, C.H.Dietrich, Malaise trap in 2º forest, VN19-2-2; 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3578ºN 105.5966ºE, 560m, 5 July 2019, C.H.Dietrich, sweeping in forest, VN19-3-1 (INHS). Notes. This species was recently described from southern China (Yunnan). It is here recorded from Vietnam for the first time. Homa haematophilus (Kirkaldy, 1906) Eupteryx haematophilus Kirkaldy, 1906: 362 Material examined. 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 5–8 July 2019, C.H.Dietrich, Malaise trap in 2º forest, VN19-2-2; 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd. VN19-2-3 (INHS). Notes. This appears to be the most widespread species of the genus, having been recorded from Australia, southern China, the Philippines, Sri Lanka and Thailand. It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 270, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Xu, Y., Lu, S., Dietrich, C. H. & Qin, D. (2018) Descriptions of two new leafhopper species of the genus Flaviata Lu Qin (Hemiptera, Cicadellidae, Typhlocybinae) from Southern China, with a key to known species. Zootaxa, 4457 (4), 577 - 582. https: // doi. org / 10.11646 / zootaxa. 4457.4.7","Kirkaldy, G. W. (1906) Leaf-hoppers and their natural enemies. (Pt. IX Leaf-hoppers. Hemiptera). Hawaiian Sugar Planters' Association. Division of Entomology Bulletin, 1 (9), 271 - 479."]}

Hochiminhus tamdaoensis n. sp. (Figures 4 A–O, 11M) Description. Length of male 4.3 mm; female 4.4 mm. Crown with two pairs of small apical brown spots, two pairs of larger orange maculae on disc and pair of small brown spots posterolaterad of ocelli; face with frontoclypeus mostly orange, ocellocular area, anteclypeus, lorum and lower part of gena mostly black; pronotum with large orange-brown area medially and four dark brown posterior submarginal maculae; mesonotum and scutellum mostly yellow, basal triangles slightly infuscated; forewing with round black spot near base and larger black macula at apex of clavus, costal margin with black maculae at base, midlength and near apex, band of bright yellow opaque pigment present between basal and medial macula; thoracic pleurites mostly dark brown to black; front and middle femora and hind tarsomeres I and II mostly black. Apex of male pygofer lobe unpigmented and concavely emarginate. Style with three distal processes: one short, rounded preapical process extended mesad; one longer lateral spine extended posterodorsad; and one larger distal spine with knifelike dorsal margin extended dorsomesad and crossing counterpart on other style forming X in ventral view. Female sternite VII with posterior margin broadly and shallowly emarginate, bordered with fuscous. Etymology. The species name refers to the type locality. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4561ºN 105.6501ºE, 983m, 10 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-7-1 [VNMN]. Paratype, 1 female, VIETNAM: Vinh Phuc, Tam Dao 21.4509ºN 105.6325ºE, 741m, 13 July 2019, C.H.Dietrich, sweeping understory in 2º pine forest, VN19-8-2 (INHS)., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 252, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088

Tribe Stenometopiini Stirellus neospeciosus Duan, Webb & Zhang 2016 Material examined. One female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3; 1 male, same data except 5 July 2019, VN 19-2-1 (INHS). Notes. This species is widespread in southern China. It is recorded here from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 258, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Duan, Y., Webb, M. D. & Zhang, Y. (2016). Review of the leafhopper tribe Stenometopiini (Hemiptera: Cicadellidae: Deltocephalinae) from China with description of four new species. Zootaxa, 4171 (1), 101 - 138. https: // doi. org / 10.11646 / zootaxa. 4171.1.4"]}

Tribe Signoretiini Signoretia aureola Distant, 1908 (Figure 11Y) Material examined. 1 male, VIETNAM: Vinh Phuc, Tam Dao, 21.4509ºN 105.6325ºE, 741m, 13 July 2019, C.H.Dietrich, sweeping understory in 2º pine forest, VN19-8-2; 1 female, VIETNAM: Vinh Phuc, Tam Dao, 21.4589ºN 105.6479ºE, 970m, 10 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-5-2 (INHS). Notes. This species was described from Myanmar and has more recently been recorded from India. It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 266, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Distant, W. L. (1908). The fauna of British India including Ceylon and Burma, Rhynchota. Vol. IV. Taylor & Francis, London, 501 pp."]}

Tribe Agalliini Multinervis guangxiensis Li & Li, 2013 (Figure 11X) Material examined. 2 males, 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN, 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd., VN19-2-3 (INHS). Notes. This species was described from southern China (Guangxi). It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 265, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Li, H. & Li, Z. Z. (2013) Description of a new leafhopper genus and species of Megophthalminae (Hemiptera, Auchenorrhyncha, Cicadellidae) from Southern China. Journal of the Kansas Entomological Society, 86 (4), 295 - 300. https: // doi. org / 10.2317 / JKES 121118.1"]}

Tribe Balbillini Stenotortor subhimalaya Viraktamath & Wesley, 1988 (Figure 11S) Material examined. VIETNAM: Vinh Phuc, Tam Dao summit trail, 21.4622ºN 105.6473ºE, 970m 11 July 2019, C.H.Dietrich, sweeping forest understory, incl. bamboo, VN19-6-1 (INHS). Notes. This species was previously recorded from India. It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 260, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Viraktamath, C. A. & Wesley, C. S. (1988) Revision of the Nirvaninae (Homoptera: Cicadellidae) of the Indian subcontinent. Great Basin Naturalist Memoirs, 12, 182 - 223. https: // doi. org / 10.5962 / bhl. part. 10986"]}

Signoretia tamdaoensis n. sp. (Figures 9, 11Z) Description. Length of male 6.0 mm. Overall coloration pale yellow without distinct markings. Head in profile with crown horizontal and face moderately convex, crown in dorsal view parabolically produced medially, basal width between eyes 1.5X medial length; crown surface concave, midline weakly carinate, lateral margin sharply carinate, submarginal carina obsolete. Pronotum slightly less than 3X longer than crown, slightly convex overall but slightly depressed medially and submarginally, evenly punctate except punctures less developed in pair of anterolateral depressions, lateral margin sharply carinate and slightly longer than eye. Front femur row IC with 9–12 fine setae. Hind tibia rows AD and AV each with 8 macrosetae. Male pygofer quadrate in lateral view, with scattered fine setae, stout process arising posteroventrally, strongly divergent from lobe margin, curved dorsad and extended slightly dorsad of lobe, with several short stout scattered setae, apex acuminate. Segment X well sclerotized and extended beyond apex of pygofer lobe, with pair of retrorse spines arising near midlength and extended nearly to base. Subgenital plate extended well beyond pygofer, tapered from base to narrowly rounded apex, dorsolateral margin with row of short, fine setae and row of long, fine setae extended from near base to apex. Style apophysis moderately long, evenly curved ventrolaterad and tapered, with few scattered teeth. Connective somewhat elongate with bilobed base and slender stem articulated to aedeagus. Aedeagus with ventral preatrium bearing pair of elongate slender processes that cross each other near base and diverge distally in ventral view, each slightly expanded near middle then tapered to acute apex with dense patch of minute hairlike microtrichia dorsally near apex; aedeagal atrium expanded in posterior view with pair of large spinelike lateral processes extended dorsolaterad; shaft arising from dorsal part of atrium, short, arched, with unpaired ventral preapical spine extended ventrad; gonopore indistinct in distal unsclerotized area. Etymology. The new species name refers to the type locality, Tam Dao. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4509ºN 105.6325ºE, 741m, 12 July 2019, C.H.Dietrich, sweeping understory in 2º pine forest, VN19-8-1 (VNMN). Paratypes, 2 females, same data as holotype; 1 male, 2 females, VIETNAM: Vinh Phuc, Tam Dao, 21.4589ºN 105.6479ºE, 970m, 10 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-5-2 (INHS). Notes. This species appears to be closely related to S. mishmiensis Viraktamath & Webb described from Myanmar but also known from southern China (Guangxi; Dietrich unpublished), which is nearly identical in external appearance and has similar male terminalia, including basally crossed aedeagal processes. The new species is easily distinguished by the presence of large spines on male abdominal segment X, a preapical ventral spine on the aedeagal shaft, and the hairlike microtrichia of the basal aedeagal processes restricted to a small area near the apex (Fig. 9G).

Abrus digitatus n. sp. (Figures 1 A–N, 11D) Description. Length of male 8.2 mm, female 9.0 mm. Overall color light brown; crown with pair of small black apical submedial black spots flanked by larger pair of black maculae bordering ocelli posteriorly; pronotum with pair of small submedial spots, lateral margin with black band just below carina; forewing venation pale brown, central and inner anteapical cell each with small black spot; legs with uniform tan color except bases of macrosetae dark. Front femur IC row with 5 fine setae, AV row continuous with IC and bearing 10 moderately long stout setae and 4 distinctly shorter setae near base; row PV with 3–4 setae; tibia rows AD and PD each with 7 macrosetae, AV and PV each with numerous macrosetae. Hind tibial formula PD:AD:AV 20:13:22, first tarsomere pecten with 3 platellae. Forewing venation complete, inner apical cell closed, clavus with 1–2 extra crossveins. Male pygofer produced posterodorsally, apex of lobe divided into two acute processes subequal in size with elongate digitiform membranous process extended between them; macrosetae divided into distinct posterodorsal and basoventral groups. Subgenital plate ovoid in ventral view, macrosetae arranged in narrow sublateral band. Style with preapical lobe very short and obtuse, apophysis relatively long and slightly sinuate, apex truncate with blunt lateral, mesal and ventral points. Connective with stem constricted medially, widened and truncate posteriorly, slightly shorter than anterior arms, arms only slightly separated anteriorly. Aedeagus with dorsal apodeme flattened antero-posteriorly, nearly parallel-sided in posterior view except for pair of short lateral preapical projections, deeply emarginate dorsally; large, knife-like unpaired dorsal process above base of gonopore-bearing shaft strongly compressed, broad and parallel-sided in lateral view, evenly curved dorsad, bearing pair of lateral flanges that give rise to pair of flattened acute preapical processes extended dorsolaterad; gonopore-bearing shaft relatively slender, tubular, tapered distally, curved dorsad and extended nearly to apex of dorsal process, with pair of slender preapical lateral processes extended ventrolaterad, apex arrowhead shaped; gonopore preapical on posterior surface. Female sternite VII with posterior margin nearly truncate with very slight medial concavity, fuscous medially. First valvula moderately broad through most of length, tapered to sharp point distally, dorsal sculptured area submarginal, consisting of vertical rows of indistinct granules, ventroapical sculpture scale-like. Second valvulae relatively slender, slightly tapered beyond sclerotized dorsal saddle at midlength, dorsal margin without teeth or serrations, apex tapered to blunt point. Etymology. The species name, a Latinized adjective, refers to the digitate distal process of the male pygofer. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao summit trail, 21.4622ºN 105.6473ºE, 970m 11 July 2019, C.H.Dietrich, sweeping forest understory, incl. bamboo, VN 19-6-1 (VNMN). Paratypes: 1 male, 2 females, same data as holotype; 5 males, VIETNAM: Vinh Phuc, Tam Dao 21.4561ºN 105.6501ºE, 983m, 10-13 July 2019, C.H.Dietrich, Malaise trap in forest opening, VN19-7-2; 1 male, VIETNAM: Vinh Phuc, Tam Dao, 21.4533ºN 105.6480ºE, 942m, 12 July 2019, C.H.Dietrich, sweeping forest edge, VN19-9-2 (INHS). Notes. This species resembles most other species of Abrus in external appearance but may be distinguished by the male terminalia. The new species appears to be closest to Abrus huangi Dai & Zhang, described from southern China (Guangxi), based on the pygofer structure, shape of the connective and overall structure of the aedeagus but may be easily distinguished by the smooth (not serrate) posterior margin of the basal aedeagal process, the dorsolaterally (not ventrolaterally) projecting processes of this same structure, and the broader (not tapered) style apex.

Tribe Opsiini Hishimonus aberrans Knight, 1970 Material examined. One male, VIETNAM: Vinh Phuc, Tam Dao, 21.4577ºN 105.6494ºE, 965m, 10 July 2019, C.H.Dietrich, Hg vapor light, VN19-10-1 (INHS). Notes. This species was described from Taiwan and was more recently recorded from northeastern India (Mizoram) and Thailand (Dai et al. 2013, Viraktamath & Murthy (2014). It is here recorded from Vietnam for the first time. Hishimonoides bougainvilleae Viraktamath et al., 1987 (Figure 11K) Material examined. 2 males, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance 20.2501ºN 105.7145ºE 156m, 3 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-1-2 (INHS). Notes. This species was previously recorded from India. It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 249, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Knight, W. J. (1970) A revision of the genus Hishimonus Ishihara (Hom., Cicadellidae). Suomen Hyonteistieteellinen Aikakauskirja, 36, 125 - 139.","Viraktamath, C. A., Anantha Murthy, H. V. & Viraktamath, S. (1987) The deltocephaline leafhopper genus Hishimonoides in the Indian subcontinent (Homoptera). Journal of Natural History, 21 (5), 1225 - 1236. https: // doi. org / 10.1080 / 00222938700770741"]}

Drabescoides bispinosa n. sp. (Figures 2 A–G, 11I) Description. Length of male 7.5 mm. Overall coloration pale brownish ochraceous with symmetrical black markings. Crown with large black medial macula and pair of slender curved lateral lines, face with dorsal carina, second antennal segment and several paired marks on frontoclypeus black. Pronotum with posterior two thirds mostly black densely marked with small pale spots somewhat irregularly arranged. Exposed part of mesonotum with seven curved longitudinal lines, medial and submedial lines extended onto scutellum. Forewing veins dark brown, cells with dark brown maculae centrally. Front femur mostly dark brown anteriorly, middle femur with two longitudinal brown stripes anteriorly; hind femur and all tibiae and tarsi indistinctly marked. Front femur row IC with 6–7 very fine setae grouped near apex, AV without setae in basal half; tibia rows AD and PD with 7 and 5 macrosetae, respectively, AV and PV each with numerous setae. Middle femur with 4 moderately long, stout AV setae. Hind tibia rows PD, AD, AV with 28, 16 and 17 setae, respectively; tarsomere I pecten with 3 platellae. Forewing venation complete; inner anteapical cell open; clavus with one crossvein between claval suture and PCu and one between PCu and A1. Male pygofer relatively elongate, apex extended well beyond apex of anal tube; lobe with single macroseta (only socket present in holotype), with two preapical spinelike projections, one near apex short and projected posterodorsad, other arising from ventral margin longer and strongly curved dorsolaterad. Subgenital plate triangular, compressed distally and extended to apex of pygofer lobe. Style with preapical lobe weakly developed; apophysis as long as basal part, apex expanded and rounded laterally in ventral view. Connective stem subequal to arms in length and width, apex deeply emarginate; arms weakly separated, closely appressed anteriorly. Aedeagus with dorsal apodeme V-shaped in posterior view; shaft evenly curved dorsad, somewhat boatlike in appearance due to broad dorsolateral flanges extended between base and preapex of shaft in lateral view; apex spatulate with short acute medial projection in posteroventral view; gonopore preapical on dorsal surface. Etymology. The species name is a Latinized adjective referring to the presence of two spines on each pygofer lobe in the male. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4577ºN 105.6494ºE, 965m, 10 July 2019, C.H.Dietrich, Hg vapor light, VN19-10-1 (VNMN). Notes. This species will run to D. longiarma Li & Li in the key to species provided by Qu et al. (2014) but differs from that species in having only two spinelike processes on each pygofer lobe, in having the dorsolateral flanges of the aedeagal shaft wider and the stem of the connective no wider than the combined width of the anterior arms., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 246-248, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088

Tribe Paralimnini Paralaevicephalus primus (Rao, 1989) Khasiana prima Rao, 1989 Material examined. 1 male, 1 female, VIETNAM: Vinh Phuc, Tam Dao, 21.4533ºN 105.6480ºE, 942m, 12 July 2019, C.H.Dietrich, sweeping forest edge, VN19-9-2 (INHS). Notes. This grass-feeding species was described from India and has also been recorded from southern China (Guangxi, Hainan, Yunnan). It is recorded here from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 249, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Rao, K. R. (1989) Descriptions of some new leafhoppers (Homoptera: Cicadellidae) with notes on some synonymies and imperfectly known species from India. Hexapoda (Insecta Indica), 1 (1 - 2), 59 - 84."]}

Recent collecting in northern Vietnam yielded specimens of several new leafhopper species, two of which represent new monotypic genera, and several additional species not previously recorded from Vietnam. The two new genera (Hochiminus n. gen. and Pseudocestius n. gen.) and 15 new species (Abrus digitatus n. sp., Aeternus ninhbinhensis n. sp., Drabescoides bispinosa n. sp., Tenompoella vietnamensis n. sp., Uzelina (Uzelina) vietnamensis sp. n., Hochiminhus tamdaoensis n. sp., Pseudocestius cucphuongensis n. sp., Phlogothamnus pseudorugosus n. sp., Scaphoidella albopunctata n. sp., Bundera onukiiformis n. sp., Carinata arcuata n. sp., Traiguma hamocauda n. sp., Signoretia tamdaoensis n. sp., Amrasca (Quartasca) curvata n. sp., Amrasca (Quartasca) excavata n. sp.) are described and illustrated and comparative notes are provided. An additional 28 species representing 20 genera are newly recorded from Vietnam. Most of the latter were previously recorded only from southern China. The enigmatic species, Tardrabassus pakneunensis Dai & Dietrich, previously known from two males collected in Laos in 1918, is newly recorded from Vietnam based on recently collected female specimens. The ovipositor structure of the female confirms placement of Tardrabassus in Iassinae. The female pregenital sternite and ovipositor of Hamulotettix ungulatus Dai & Zhang are also illustrated for the first time. A new synonymy is also proposed: Ujna consors Distant, 1908 equals Mileewa puerana Yang & Meng, 2010, n. syn.

Pseudocestius n. gen. Type species. Pseudocestius cucphuongensis n. sp. Description. Medium-sized, robust leafhoppers. Coloration stramineous, with numerous tiny brown spots and symmetrical larger black and brown maculae. Head short and broad; crown flat, broadly rounded anteriorly, with anterior and posterior margins parallel, length less than half basal width between eyes, basal width between eyes less than twice eye width, disc glabrous, anterior margin shagreen, rounded to face; ocelli large, on anterior margin of crown and only partly visible from above, separated from eye by slightly more than one ocellar diameter; eye mesal margin with broad, shallow emargination adjacent to antennal base; antennal base slightly below midheight of eye, antenna shorter than head width; face in profile less than 45º from horizontal, wider than tall in anterior view; frontoclypeus broad, moderately tumid, shagreen; lateral frontal sutures obsolete above antennal pits; anteclypeus flat, parallel-sided, extended to ventral margin of face, apex truncate; lorum flat, approximately as wide as anteclypeus, well separated from lower margin of maxillary plate; maxillary sensillum well separated from lateral margin of lorum; gena with obtuse emargination below eye; rostrum not extended beyond front trochanter. Pronotum slightly convex, slightly declivous anteriorly, surface with very weak transverse striations and indistinct punctations, lateral margin carinate but very short, eye nearly touching forewing base. Exposed part of mesonotum and scutellum wider than long, scutellum transversely rugose and slightly protuberant dorsad. Front femur AM1 near ventral margin; AV1 longer than IC setae but similar in width; IC with single row of ca. 8 long, fine setae; AV with 6–8 short, stout setae in single row basally; tibia with dorsal surface rounded, rows AD and PD with 1 and 4 setae, respectively, AV with numerous macrosetae, PV without macrosetae. Middle trochanter with stout ventroapical seta; femur AV with numerous short, stout setae basally and single slightly longer seta distally. Hind femur macrosetae 2+2+1, tibial rows PD, AD, AV with 16, 10 and 13 macrosetae, PD setae alternating short and long, AD with 1–4 short setae between successive macrosetae; tarsomere I with 2 rows of simple plantar setae, pecten with 3 platellae, inner seta of pecten tapered and slightly shorter than platellae. Forewing venation complete, unmodified except central anteapical cell divided by crossvein and clavus with extra partial crossveins, three anteapical cells and four apical cells present; appendix moderately developed, restricted to anal margin. Hind wing venation complete, unmodified. Male 2S apodemes long, thin, divergent and capitate, extended to posterior margin of sternite III. Pygofer incised nearly to base dorsally, lobe with group of macrosetae posterodorsally and group of long, fine setae ventrolaterally near base, inner surface with numerous conspicuous sensilla preapically, apex of lobe produced into spinelike process. Segment X short, weakly sclerotized, without processes. Valve triangular, wider than long. Subgenital plates separate from each other and movably articulated to valve, large, boatlike, tapered from base to apex, lateral margin slightly concave, apex truncate, with lateral band of numerous macrosetae and lateral row of fine setae slightly shorter than macrosetae. Style broadly bilobed basally, preapical lobe short and rounded, apophysis long and nearly straight, apex cheliform with preapical point and curved distal hook. Connective H-shaped, anterior arms bowed laterad but approaching each other anteriorly, stem deeply emarginate with lateral arms articulated to atrial processes of aedeagus. Aedeagus with atrium broadened dorsally and extended laterally into pair of looplike structures, each with elongate process articulated to atrium mesally and to ridge on inner wall of pygofer laterally; aedeagal shaft simple, tubular, curved posterodorsad; gonopore apical. Partially sclerotized dorsal connective present between aedeagal atrium and base of anal tube. Etymology. The genus name, a masculine noun, combines “Pseudo” (false) with Cestius, the name of a superficially similar genus of Opsiini. Notes. Pseudocestius resembles some genera of Opsiini, particularly Opsius Fieber and Cestius Distant (treated as separate valid genera by Dai et al. (2010) but considered synonyms by some authors) in having the crown short and broad with a rounded anterior margin. It also resembles many genera of Opsiina in having a dorsal color pattern consisting of numerous minute brown spots. It differs from Opsiini in having the aedeagus with a single shaft and gonopore. Although, as in Hochiminhus n. gen., Pseudocestius lacks distinct punctations on the dorsal integument and has the crown rounded to the face, this genus is tentatively assigned to Punctulini based on the following traits: head not produced, male 2S apodemes elongated, divergent and capitate, subgenital plates with setae scattered, aedeagal shaft simple, without processes, dorsal connective present; style lacking preapical lobe, apex cheliform.

Subfamily Iassinae Tardrabassus pakneunensis Dai & Dietrich, 2012 (Figures 8 A–H) Description of female. Similar to male in overall structure but coloration lighter, transverse yellow band of face less well delimited and transverse preapical band of forewing complete. Dorsum chestnut brown, pronotum with numerous irregular small yellow spots, scutellum bright yellow. Rostrum slender, apex not expanded. Sternite VII quadrate, wider than long, posterior margin with small median trapezoidal emargination flanked by pair of short, acute processes, lateral lobes truncate. First valvular elongate, slender, broadened preapically with ovoid patch of strigate sculpture not extended to margins. Second valvula elongate and slender with pair of widely spaced preapical teeth, apex obliquely tapered. Gonoplacs without macrosetae. Material examined. Two females, VIETNAM: Thua Thien Hue, A Lýới District, A Roàng, 4 May 2005, 600– 700 m (VNMN). Notes. This species was described based on two male specimens from a village on the Mekong River in central Laos collected in 1918. It is here recorded from Vietnam for the first time based on recently collected material. The species was tentatively placed in Iassinae but Dai & Dietrich (2012) noted that it exhibits a combination of traits also found in Tartessinae and in the Deltocephaline tribe Drabescini. Two females recently collected in Vietnam are here considered conspecific with the males from Laos. The ovipositor structure appears to confirm that placement in Iassinae is correct. The second valvulae have two widely spaced preapical teeth, a characteristic that appears to be unique to this subfamily although it does not occur in all iassines. The first valvulae are unique among iassines in having an ovoid patch of strigate sculpture preapically. Sexual dimorphism in the structure of the lower part of the face is common in leafhoppers, occurring sporadically among members of several subfamilies including Deltocephalinae, Eurymelinae, Iassinae and Typhlocybinae. Usually this variation is manifested in a relatively swollen anteclypeus and lorum in the male. Sexual dimorphism in the shape of the rostrum, as occurs in Tardrabassus, appears to be less common, having been reported previously only in Eurymelinae (sensu lato; Xue et al. 2020).

Hochiminhus n. gen. Type species: Hochiminhus tamdaoensis n. sp. Description. Medium-sized, somewhat depressed leafhoppers. Coloration tan with symmetrical brown, black, yellow and ochraceous markings. Head produced; crown depressed, anterior margin bluntly angulate in dorsal view, longer medially than next to eye but median length less than basal width between eyes, width between eyes less than twice eye width, texture of disc glabrous, anterior margin shagreen, narrowly rounded to face; ocelli large, on anterior margin of crown, completely visible in dorsal view, separated from eye by one ocellar diameter; eye with mesal margin notched next to antennal base; antennal base near midheight of eye, antenna approximately as long as head width; face nearly horizontal in profile, frontoclypeus weakly convex, shagreen; lateral frontal sutures well separated from eyes, slightly divergent dorsally, extended to dorsal margin of face near lateral margins of ocelli; anteclypeus flat, parallel-sided, apex truncate and slightly short of lower margin of maxillary plate; clypeal suture well delimited, slightly arched; lorum flat, approximately as wide as anteclypeus, well separated from lower margin of face, basal fourth overlapping frontoclypeus; gena with approximately right-angled emargination below eye, with erect fine seta below antennal base close to clypeogenal suture; rostrum not extended beyond front trochanter. Pronotum narrower than head, slightly convex, declivous anteriorly, surface glabrous, lateral margin carinate, shorter than half eye width. Exposed part of mesonotum and scutellum flat, slightly wider than long. Front femur AM1 on ventral margin, AV1 longer than IC setae but approximately same width, IC setae fine, in single row; AV with numerous short, stout setae in single row in basal half; tibia with dorsal surface rounded, rows AD and PD with 1 and 4 macrosetae, respectively, AV with numerous macrosetae, PV without macrosetae. Middle trochanter with stout ventroapical seta; femur with numerous short, stout AV setae basally and one larger preapical seta. Hind femur macrosetal formula 2+2+1; tibia rows PD, AD and AV with 20, 12 and 18 macrosetae, respectively; row AD with short, stout setae between respective macrosetae; PD setae alternating long and short; tarsomere I with two plantar rows of simple setae, pecten with 3 platellae, inner seta of pecten tapered and slightly shorter than platellae. Forewing glabrous, venation well delimited, veins pale yellow, contrasting with darker pigment in cells, reticulate with numerous extra crossveins or partial crossveins toward base of corium and clavus; cells mostly transparent, three anteapical and four apical cells present, inner apical cell largest but not extended to wing apex; appendix moderately developed but restricted to anal margin. Hind wing venation complete, unmodified. Male 2S apodemes elongate, well separated, capitate, extended to posterior margin of sternite III. Pygofer incised nearly to base dorsally, lobe without macrosetae or appendages, with group of moderately long, fine setae posterodorsally and group of longer fine setae ventrolaterally near base. Segment X membranous, without processes. Valve pentagonal, wider than long, with posterior margin rounded. Subgenital plates separate from each other and movably articulated to valve, triangular, slightly longer than wide, lateral margin convex, with lateral band of long macrosetae and longer fine setae, apex narrowly rounded. Style base with well-developed mesal and lateral lobes, apophysis greatly enlarged and ornate, extended beyond genital capsule, with large preapical and apical spines. Connective Y-shaped with well-developed stem; anterior arms bowed laterad medially but approaching each other anteriorly. Aedeagus simple, without processes, atrium much wider than shaft, shaft short, curved dorsad; gonopore on posterior surface at apex. Separate, well-sclerotized dorsal connective articulated between atrium of aedeagus and base of anal tube. Female sternite VII broadly emarginate posteriorly. First valvula slender, apex tapered to sharp point, dorsal sculpture imbricate, extended to margin. Second valvulae abruptly broadened beyond sclerotized dorsal saddle near basal third, distal section of dorsal margin with several widely spaced teeth each separated by several smaller denticles, apex tapered to blunt point. Etymology. The genus is named in memory of Ho Chi Minh, leader of the Vietnamese Revolution; gender masculine. Notes. The recently described tribe Punctulini was erected to include 3 morphologically peculiar deltocephaline genera from the Oriental and Oceanian regions (Dai et al. 2017). The tribe was characterized by the following diagnostic traits: pronotum, mesonotum, forewings, and often head, punctate; anterior margin of head carinate; male 2S apodemes long, well-developed, widening apically; anteclypeus not extended to ventral margin of face; integument often with numerous fine setae. Hochiminhus agrees with some but not all of these traits, having the male 2S apodemes long and capitate and the anteclypeus not extended to the ventral margin of the face, but lacks distinct punctations and fine setae on the dorsum and has the anterior margin of the head rounded to the face, without a distinct carina. In lacking some of the more unusual traits found in previously described Punctulini, Hochiminhus looks more like a “normal” deltocephaline. Nevertheless, Hochiminhus also resembles previously described Punctulini in having the aedeagus simple, without processes and has a distinct dorsal connective, as in the punctuline genus Hirsutula Dai et al. It also has numerous scattered setae on the subgenital plates and lacks a preapical lobe on the style, as in two of the three previously described punctuline genera, and resembles Taveuneus Dai et al. in the color pattern of the forewing. The bizarrely, multipronged style apex of Hochiminus may represent an extreme form of the distinctly toothed style apex of Punctulus Dai et al. and Hirsutula. Based on these traits, we tentatively include Hochiminhus in Punctulini. Elongate, capitate 2S apodemes are also present in the tribes Opsiini and Vartini but members of the former have the aedeagus divided into 2 shafts, each with a separate gonopore and members of the latter have the gena very broad, not emarginate below the eye, and the head strongly produced with an acute apex., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 251-252, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Dai, W., Zahniser, J. N., Viraktamath, C. A. & Webb, M. D. (2017) Punctulini (Hemiptera: Cicadellidae: Deltocephalinae), a new leafhopper tribe from the Oriental region and Pacific Islands. Zootaxa, 4226 (2), 229 - 248. https: // doi. org / 10.11646 / zootaxa. 4226.2.4"]}

Bundera onukiiformis n. sp. (Figures 7 A–J, 11T) Description. Length of male 6.3 mm. Crown anterior and posterior black maculae narrowly joined to each other medially, anterior macula with two anterior lobes surrounding ovoid medioapical yellow spot and two lateral lobes extended across submarginal oblique carinae behind ocelli, posterior macula quadrate, covering area between eyes; face with frontoclypeus and medial part of anteclypeus bright orange, remainder pale yellow. Pronotum black with lateral margins broadly ochraceous; mesonotum with lateral triangles and median longitudinal band black, remain- der ochraceous. Forewing grey with indistinct broad preapical transverse fuscous band. Thoracic pleurites and legs yellow. Crown with median carina well developed but scarcely elevated above submarginal carinae in profile, median length 1.2X basal width between eyes. Front femur AM1 near midheight, IC with 12 fine setae, AV with 4 somewhat larger setae nearly continuous with IC row, PV with 8 short setae near midlength and one larger seta preapically; tibia with numerous short setae in rows PD, AD and PV, AV with numerous long macrosetae, distinct accessory row of 4 setae present between AD and AV. Hind tibia formula PD:AD:AV 23:11:17; tarsomere I pecten with 4 tapered setae, Male pygofer lobe slightly longer than tall, with irregular row of submarginal posteroventral setae; ventral appendage very slender and needlelike, extended along ventral margin but not reaching apex; apex obliquely truncate with small lobe bearing several small spines extended anteromesad from apex. Segment X densely clothed with conspicuous microtrichia, with pair of short spinose lobes ventrolaterally. Subgenital plate narrow at base, evenly broadened to midlength then roundly tapered toward apex, macrosetae arranged in single submedial row in basal half and scattered distally, several long, fine setae present at apex and fewer, shorter fine setae along dorsolateral margin toward base. Style extended to apex of connective stem, apophysis with short, acute ventral heel and greatly elongated and acuminate toe. Aedeagal atrium with lateral lobes large and broadly rounded, preatrium short, base of aedeagus in lateral view large, quadrate, with posteroventral margin forming 90º angle; shaft in lateral view parallel-sided in, more or less evenly curved anterodorsad, apex rounded, distinctly emarginate in dorsal view, gonopore apical. Etymology. The species name alludes to the superficial similarity of this species to species of the genus Onukia. Material examined. Holotype male, VIETNAM: Vinh Phuc, Tam Dao, 21.4533ºN 105.6480ºE, 942m, 12 July 2019, C.H.Dietrich, sweeping forest edge, VN19-9-2 (VNMN). Notes. Placement of this species to genus is somewhat uncertain. Externally it resembles species of Onukia Matsumura in having the crown acutely produced with the median longitudinal carina prominent and flanked by lateral concavities, but the male genitalia are more typical of Bundera Distant. Neither of these genera is well defined morphologically and they were not recovered as monophyletic in the recent comprehensive phylogenetic analysis of Wang et al. (2017). The new species differs from other described Bundera species in having the crown narrower and more acutely produced. The markings on the crown and the structure of the male genitalia resemble those of B. bambusana but the spinose internal distal lobe of the pygofer and the small spinose ventrolateral lobes of the anal tube are unique., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 260-262, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Wang, Y., Dietrich, C. H. & Zhang, Y. (2017) Phylogeny and historical biogeography of leafhopper subfamily Evacanthinae (Hemiptera: Cicadellidae) based on morphological and molecular data. Scientific Reports, 7, 45387. https: // doi. org / 10.1038 / srep 45387"]}

Aeternus ninhbinhensis n. sp. (Figures 1 O–W) Description. Length of male 5.0 mm. Head with crown bright orange with pair of oblique crescent-shaped clear areas submedially on disc, anterior margin yellow medially; face mostly pale yellow except large black macula on gena below eye and border of lorum fuscous. Pronotum light brown with indistinct orange band along posterior margin. Exposed part of mesonotum and scutellum bright orange except basal triangles yellow. Forewing clavus with basal patch and commissural margin bright orange, remainder of clavus and corium light brown except costal margin with wide yellow fenestra near midlength partially bordered with dark brown and diffuse brown transverse band at apex. Mesosternum fuscous, remainder of venter including legs yellow. Front femur with AM1 near midheight of anterior surface, row IC with 5 long, stout setae, AV with basal setae absent; tibia rows AD and PD with 1 and 4 macrosetae, respectively, AV with numerous macrosetae, PV with single short preapical seta. Hind tibial formula PD:AD:AV 20:11:16; first tarsomere pecten with 3 platellae. Male pygofer incised to near base dorsally, lobe with posterodorsal margin acutely angulate. Segment X elongate, more than twice as long as wide and well sclerotized. Subgenital plate with lateral preapical row of 5–7 macrosetae in addition to numerous long, fine setae, lateral margin weakly convex. Connective with stem longer than arms, partly fused to base of ventral aedeagal process. Style preapical lobe relatively large, rounded; apophysis relatively slender, tapered, nearly straight, with ventromesal tooth near midlength, denticuli indistinct. Aedeagus with preatrium slender and straplike in lateral view, ventral end forming right angle with elongate nearly straight, slender process, process divided longitudinally near midlength with two distal branches closely appressed to each other, only slightly divergent and acuminate; aedeagal shaft arising from dorsal part of boatlike atrium, slender through most of length, with median longitudinal ventral groove, apex curved slightly anterodorsad; gonopore preapical on posterior surface. Etymology. The species is named for the province of the type locality. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance, 20.2501ºN 105.7145ºE 156m, 5 July 2019, C.H.Dietrich, Hg. vapor light, VN19-1-5 (VNMN). Notes. This species resembles the type species of the genus, A. hieroglyphicus Distant, in overall shape and color pattern but differs in having the pale markings of the dorsum bright orange instead of yellow. The male genitalia resemble those of the type species but segment X is much more elongate (relatively short in A. hieroglyphicus), the apex of the pygofer lobe is distinctly angulate, the subgenital plate is narrower with a nearly straight lateral margin and lateral macrosetae, the style apophysis is much more slender and lacks obvious denticles (broad and distinctly denticulate in A. hieroglyphicus), and the ventral processes of the aedeagus are fused to each other basally and nearly straight (not sinuate preapically as in A. hieroglyphicus). A male specimen from “Haut Mekong” (presumably Laos) collected in 1918 and deposited in The Natural History Museum, London, appears to be identical to the holotype from Vietnam. Photographs of this specimen by J. N. Zahniser are on the 3I website: http://dmitriev. speciesfile.org/taxahelp.asp?hc=26659&key=Erythroneura&lng=En Bambusana biflaka Li, 2011 in Li et al. 2011 Material examined. 1 male, VIETNAM: Vinh Phuc, Tam Dao, 21.4561ºN 105.6501ºE, 983m, 10–13 July 2019, C.H.Dietrich, Malaise trap in forest opening, VN19-7-2; 1 male, 1 female, VIETNAM: Vinh Phuc, Tam Dao summit trail, 21.4622ºN 105.6473ºE, 970m 11 July 2019, C.H.Dietrich, sweeping forest understory, incl. bamboo, VN19- 6-1 (INHS). Notes. This bamboo-feeding species was previously recorded from China. It is here recorded from Vietnam for the first time. Hamulotettix ungulatus Dai & Zhang, 2011 (Figures 1 X–BB, 11E) Description of female. Length 10.5 mm. Closely resembling male overall but slightly larger. Sternite VII more than twice length of sternite VI, lateral margins roundly tapered, apex pointed with acute median notch. Ovipositor protruding only slightly beyond pygofer; first valvula elongate, slender, dorsal sculpture strigate to indistinctly concatenate, extended to margin. Second valvula elongate, slender and nearly uniform in width throughout; dorsal margin with 10 distinct closely-spaced obliquely triangular teeth. Material examined. Male, VIETNAM: Ninh Binh, Cuc Phuong NP, trailhead to Cave of Prehistoric Man 20º17.574’N 105º40.015’E 248 m, 22 May 2012, K. Hill and D. Marshall, at lights. 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 5 July 2019, C.H.Dietrich, sweeping along rd., VN19- 2-1 (INHS). Notes. The male specimen examined from Vietnam appears to be identical to the holotype from Yunnan illustrated by Dai & Zhang (2011) in nearly all respects but lacks an unpaired hooklike ventral process on abdominal segment X. Thus, the specimens from Vietnam may represent a different species from the Chinese holotype, but additional collecting is needed to determine the degree to which male segment X varies among specimens. This is the first record of the species from Vietnam. The female is described here for the first time. Tambocerus dentatus Qu & Dai, 2014 (Figure 11F) Material examined. 6 males, 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance, 20.2501ºN 105.7145ºE 156m, 3 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-1-2 (INHS). Notes. This species was described from southern China (Guizhou). It is here recorded from Vietnam for the first time. Tambocerus elongatus Shen, 2008 in Shen, Shang & Zhang, 2008 Material examined. 1 male, VIETNAM: Vinh Phuc, Tam Dao, 21.4577ºN 105.6494ºE, 965m, 10 July 2019, C.H.Dietrich, Hg vapor light, VN19-10-1 (INHS). Notes. This species is common and widespread in China but apparently has not previously been recorded from outside that country. It is here recorded from Vietnam for the first time.

Tribe Mileewini Ujna consors Distant, 1908 Mileewa puerana Yang & Meng, 2010: 20, syn. nov. Material examined. 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN, 105.5983ºE, 370m, 5–8 July 2019, C.H.Dietrich, Malaise trap in 2º forest, VN19-2-2; 2 males, 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 8 July 2019, C.H.Dietrich, sweeping along rd. VN19-2-3 (INHS). Notes. This species was described from southern Myanmar and has also been recorded from southern China. It is here recorded from Vietnam for the first time. Based on the first author’s comparison of Distant’s male type of U. consors in The Natural History Museum, London, to drawings of the holotype genitalia of Mileewa puerana by Yang & Meng (2010), we consider the latter to be a synonym of the former., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on pages 265-266, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Distant, W. L. (1908). The fauna of British India including Ceylon and Burma, Rhynchota. Vol. IV. Taylor & Francis, London, 501 pp.","Yang, M. F. & Meng, Z. H. (2010) Three new species of the genus Mileewa (Hemiptera: Cicadellidae: Cicadellinae) from Yunnan, China. Entomotaxonomia, 32 (1), 18 - 24."]}

Tribe Nirvanini Sophonia lushana (Kuoh, 1973) (Figure 11V) Material examined. 1 male, 1 female, VIETNAM: Vinh Phuc, Tam Dao, 21.4589ºN 105.6479ºE, 970m, 10 July 2019, C.H. Dietrich, Hg vapor light in forest, VN 19-5-2. Notes. This species was previously recorded from southeastern China (Jiangxi)., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 263, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Kuoh, C. E. (1973) Two new species of Pseudonirvana (Hom.: Cicadellidae). Acta Entomologica Sinica, 16 (2), 180 - 187."]}

Pseudocestius cucphuongensis n. sp. (Figures 4 P–Y) Description. Length of male 3.8 mm. Crown with somewhat diffuse orange macula on disc, face with frontoclypeus ochraceous with scattered brown dots, gena and lower part of face pale stramineous. Pronotum ochraceous anteriorly, stramineous posteriorly. Scutellum with three black spots on posterior margin. Forewing veins slightly paler than surrounding cells, cells ochraceous with numerous irregularly arranged brown spots, with conspicuous larger black spot on discal cell and another on clavus between veins CuP and Pcu, marginal vein with series of dark brown spots around apex. Male pygofer with apical spinelike process extended ventrad. Subgenital plates with dorsal surfaces profusely clothed with long, fine setae, with single ventral sublateral row of macrosetae; mesal margins divergent, apex acuminate. Aedeagus with atrial process elongate, curved ventroposterad near base but thence straight and horizontal, somewhat expanded, bladelike and indistinctly areolate, tapered to acuminate apex; shaft smoothly curved and gradually tapered through most of length, slightly bent dorsad near apex, approximately as long as atrial processes, both extended to pygofer apex. Etymology. The species name refers to the type locality. Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance 20.2501ºN 105.7145ºE 156m, 4 July 2019, C.H.Dietrich, Hg. vapor light, VN19-1-4 (VNMN).

Tribe Chiasmini Gurawa minorcephala Singh-Pruthi, 1930 Figures 11G Material examined. 1 female, VIETNAM: Vinh Phuc, Tam Dao, 21.4533ºN 105.6480ºE, 942m, 12 July 2019, C.H.Dietrich, sweeping forest edge, VN19-9-2 (INHS). Notes. This species was described from Pakistan and has also been recorded from China and India. It is here recorded from Vietnam for the first time. The female from Vietnam matches the female from Pakistan illustrated by Naveed & Zhang (2018). Additional collecting is needed to determine whether the male genitalia of the Vietnam population are consistent with those of specimens from elsewhere in the range of this species., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 246, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Singh-Pruthi, H. (1930) Studies on Indian Jassidae (Homopteara). Part I. Introductory and description of some new genera and species. Memoirs of the Indian Museum, 11 (1), 1 - 68."]}

Tribe Deltocephalini Maiestas dinghuensis Zhang & Duan, 2011 Material examined. 2 males, 6 females, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance 20.2501ºN 105.7145ºE 156m, 7 July 2019, C.H.Dietrich, Hg. vapor light, VN19-1-6 (INHS). Notes. This species was previously recorded from southern China (Guangdong, Guangxi). It is here recorded from Vietnam for the first time. Maiestas remigia Zhang & Duan, 2011 (Figure 11H) Material examined. 1 male, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3578ºN, 105.5966ºE, 560m, 5 July 2019, C.H.Dietrich, sweeping in forest, VN19-3-1 (INHS). Notes. This species was described from southern China (Guanxi and Hainan). It is here recorded from Vietnam for the first time., Published as part of Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, pp. 241-273 in Zootaxa 4877 (2) on page 246, DOI: 10.11646/zootaxa.4877.2.2, http://zenodo.org/record/4424088, {"references":["Zhang, Y. & Duan, Y. N. (2011) Review of the Deltocephalus group of leafhoppers (Hemiptera: Cicadellidae: Deltocephalinae) in China. Zootaxa, 2870, 1 - 47. https: // doi. org / 10.11646 / zootaxa. 2870.1.1"]}