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The complete mitochondrial genomes (mitogenomes) of two DNA barcode-defined haplotypes of Metcalfa pruinosa and one of Salurnis marginella (Hemiptera: Flatidae) were sequenced and compared to those of other Fulgoroidea species. Furthermore, the mitogenome sequences were used to reconstruct phylogenetic relationships among fulgoroid families. The three mitogenomes, including that of the available species of Flatidae, commonly possessed distinctive structures in the 1702–1836 bp A+T-rich region, such as two repeat regions at each end and a large centered nonrepeat region. All members of the superfamily Fulgoroidea, including the Flatidae, consistently possessed a motiflike sequence (TAGTA) at the ND1 and trnS2 junction. The phylogenetic analyses consistently recovered the familial relationships of (((((Ricaniidae + Issidae) + Flatidae) + Fulgoridae) + Achilidae) + Derbidae) in the amino acid-based analysis, with the placement of Cixiidae and Delphacidae as the earliest-derived lineages of fulgoroid families, whereas the monophyly of Delphacidae was not congruent between tree-constructing algorithms.

Ricania speculum is an alien insect feeding on several host plants belonging to several families, including important vegetables, crops, ornamental plants, wild plants as well as trees. For the first time, recently, Chrysoperla sp. and coccinellid beetles have been observed preying on this species in the field on Citrus sp. and Laurus nobilis plants. The main purposes of this work were to evaluate the possible predation capability of these groups of insects and determine their prey preference in laboratory trials. In the choice trials, R. speculum nymphs were paired in a confined space and exposed for 24h to single predators: Ch. carnea complex and to the coccinellids Cryptolaemus montrouzieri, Adalia bipunctata, Coccinella septempunctata, and Propylea quatuordecimpunctata. Specimens of Aphis rumicis, an aphid frequently found on her baceous plants, were used as a control prey. In the cage trials, a single Ch. carnea complex second-instar larva was placed into a jar containing a tomato plant with ten R. speculum nymphs. In the choice trials, a high mortality percentage of both preys was observed with the Ch. carnea complex, while in those with Coccinellids only high A. rumicis mortality was reported. In the cage trials, 13% mortality of R. speculm was recorded after 24h while after 72h and 168h prey mortalities reached 18% and 25%, respectively. The results of the study showed that larvae of the Ch. carnea complex could be potential predators of R. speculum, while coccinellids do not seem promising predators of this alien species.

A new monotypic genus of ricaniid planthoppers (Hemiptera: Fulgoromorpha: Ricaniidae), Tarehylava gen. nov., is described for T. avymaina sp. nov. (type species), based on four females collected in the spiny forest ecoregion of south-western Madagascar. Habitus, as well as external and internal female genital structures of the new genus and species are described and illustrated.

Orosanga japonica Melichar (Hemiptera: Ricaniidae) is an invasive polyphagous pest in Iran. The planthopper damaged host plants by sap-sucking and egg laying on new twigs. This study aimed to determine the life table parameters of O. japonica on Rubus ulmifolius Schoot (elm leaf blackberry) and Melia azedarach L. (chinaberry) under field conditions in Rudsar (North of Iran) during 2019–2020. The collected life history data were analyzed based on age-stage, two-sex life table theory. The results showed that the incubation period of O. japonica was too long (≈ 270 days) on both host plants. The nymphs emerged from mid-May 2020. The planthopper had five nymphal stages under field conditions. The nymphal duration was 41.39 ± 0.56 days and 38.13 ± 0.62 days on R. ulmifolius and M. azedarach, respectively. The total preadult survival rates were 53.2% and 51.7% on R. ulmifolius and M. azedarach, respectively. Based on the results, a significant shorter total developmental time was observed on M. azedarach. When adults emerged in late July, they laid eggs after 26.05 days and 26.75 days on R. ulmifolius and M. azedarach, respectively. The fecundity on M. azedarach (131.69 egg/female) was significantly higher than that on R. ulmifolius. However, the life table parameters were all not significantly different on the two host plants. The intrinsic rate of increase (r) were 0.0097 ± 0.0005 day−1 and 0.0105 ± 0.0006 day−1 on R. ulmifolius and M. azedarach, respectively. Generally, these findings could be helpful to establish an efficient management strategy for this exotic pest.

Chestnut is one of most important forest products in Korea. However, Ricania shantungensis, an invasive species, has been increasingly causing economic damage to chestnut. To increase management efficiency of R. shantungensis in chestnut fields, its spatio-temporal distributions were analyzed using spatial analysis by distance indices (SADIE) and semivariogram. Experiments were conducted by observing selected, marked, and geo-referenced trees in two commercial chestnut fields for each developmental stage (i.e., spring egg, nymph, adult, and fall egg) of R. shantungensis from 2017 to 2019. Spatial distributions of R. shantungensis were statistically (P

The invasive species Orosanga japonica was found at 38 sites in Black Sea coastal zone of Turkey. It was recorded for the first time from the Central Black Sea Region, and for the second time from ...

Within-tree distribution of an insect pest is useful to determine sample unit, sampling location, and required sample number for this pest within a tree. This study was conducted to characterize the within-tree distribution pattern and determine an efficient sample unit for eggs of Ricania shantungensis (Hemiptera: Ricaniidae) on a chestnut tree. A total of 60 chestnut trees were randomly selected from chestnut fields in Gongju-Si and Buyeo-Gun, Korea in 2019. For each tree, 12 branches were cut at three vertical heights (low, middle, and high) in four cardinal directions (east, west, south, and north). The cut branches were observed for counting the number of egg masses per 10 cm from the branch tip. Coefficient of variation (CV) and coefficient of determination (r2) were calculated and used to determine an optimal sample unit for eggs of R. shantungensis on chestnut trees. Numbers of R. shantungensis egg masses were not significantly different (P > 0.05) vertically and horizontally within a tree. Based on CV and r2 values, the 50 cm branch tip would be the optimal sample unit for R. shantungensis eggs. Using this small sample unit for sampling of R. shantungensis eggs could be economical and efficient.

In this study, potential of the entomopathogenic fungi (EPF) isolates from dead samples of Orosanga japonica (Melichar) (Hemiptera: Ricaniidae) was evaluated. Infected specimens with fungi results confirmed that the samples were Beauveria bassiana after morphological and molecular identification. Amplicons produced two haplotypes (h = 2), which included one polymorphic site after sequence and named isolates 1 and 2. Two haplotypes were rooted with MK229193.1, MG345084.1 B. bassiana Genbank samples. Two-year survey results of the EPF effects revealed the highest mortality and natural infection rates in the field. Natural mortality rates varied between 80.35% (Fındıklı-August) and 94.8% (Çayeli-September) in 2018 and between 79.82% (Alipaşa-August) and 97.75% (Fındıklı- September) in 2019. For nymphs, the lowest LT50 value was found at 2.92 days for isolate 1 and 2.56 days for isolate 2, with a concentration of 1 × 106 conidia/ml, using the leaf dipping method. For adults, the lowest LT50 value was found at 3.02 days for isolate 1 and 3.15 days for isolate 2, with a concentration of 1 × 106 conidia/ml, using the direct spraying method. Nymph LT50 values were found a little bit lower than adults. Direct spraying methods results gave a high LT50 value for nymph in contrast to adult. Although the LT50 ratios gave high/low degree in different isolates, methods and life stages, non-significant differences were found between each other’s (p > 0.05). In general, B. bassiana natural infection rates were found high in August and September during the 2 years. Efficacy of the two isolates, which derived from naturally infected O. japonica specimens, increased with concentration. The two isolates can potentially be used for O. japonica integrated management, as a fungal biocontrol agent, but their toxicological effects on beneficial insects, such as honeybees, will need to be determined.

Ricanula peronata sp. nov. (Figs 7–9, 11) Etymology. The name is derived from the Latin word ‘ peronatus ’, referring to the periandrium with boot-shaped ventral processes in ventral view. Diagnosis. The species is similar to Ricanula curva sp. nov., but differs from the latter by having periandrium with boot-shaped ventral processes in ventral view (Fig. 9F); ventral processes of aedeagus oriented ventrally in lateral view (Fig. 9G) (apical part of ventral processes of periandrium strongly curved laterally in dorsal and ventral view; ventral processes of aedeagus S-curved in lateral view in Ricanula curva sp. nov.). Description. Measurements. Length (inc. tegmen): male 6.5–7.4 mm, female 7.3–8.8 mm. Head. Vertex (Figs 7A, C) without median carina. Frons: median and lateral carinae of frontal disc surpassing half of disc, ending about the level of antennae; apical parts of median carina weakly visible. Thorax. Pronotum (Figs 7A, C) with small round depressions submedially on each lateral side. Mesonotum: lateral carinae (Figs 7A, C) not reaching posterior margin; antero-lateral carinae not connected with anterior margin. Tegmen: postero-apical part of tegmen with two eye-spot black cells, posterior margin arcuate. Longitudinal veins ScP+RA and RP, MP arising as short common stem from basal cell. Claval veins Pcu and A 1 fused on midlength of CuP vein. Hind wing (Fig. 7F) without transverse veinlets. Hing legs: Basitarsomere of metatarsus with 8 apical teeth. Metatibiotarsal formula 2/6/8. Male terminalia. Anal tube (in dorsal view, Fig. 8B) nearly square, posterior margin strongly concave, basal margin slightly convex, lateral margins straight; anus placed before midlength, paraproct surpassing the posterior margin. Pygofer (in lateral view, Fig. 8A) with dorsal posterior angle without process. Genital styles (in lateral view, Fig. 8A) broadly triangular; ventral margin weakly sinuate; dorsal margin weakly convex, with small concavity before spine-like process. Phallic complex (Figs 9A–C): Periandrium (Figs 9D–F) with boot-shaped ventral processes in ventral view, apical part of ventral processes straight; dorsal periandrium with U-shaped structure with membranous apical part sclerotized base in dorsal view; lateral margin of periandrium with small rod-shaped processes in lateral view, rodshaped processes hidden in the periandrium (in ventral view); ventral periandrium distinctly convex. Aedeagus (Figs 9G–I) apically with two pairs of processes. Median split asymmetrical: ventral split present only in 1/5; dorsal split very deep, reaching almost basal part. All processes single armed: lateral processes longer than ventral processes, about two thirds of aedeagus; ventral processes oriented ventrally in lateral view. Female terminalia (Figs 8C–I). Pregenital sternite (Fig. 8I): posterior margin medially with two prominent processes, margin between processes with wide and shallow incision. Anal tube (in dorsal view, Fig. 8C) ovoid, with widest part medially, basal margin weakly convex, posterior margin widely concave, lateral margins arcuate; anus placed after midlength, paraproct surpassing the posterior margin. Gonoplac (Fig. 8H): posterior margin with two rows of small teeth. Coloration. General color brown (Figs 7A–B). Median part of frons (Fig. 7D) black brown. Eyes brown (Figs 7B–C), ornamented with irregular brown patches. Gena (Fig. 7B) black brown with two yellowish spots. Tegmen (Figs 7B, E) brown, costal margin with about 14 transverse black brown stripes from base to a little beyond middle, between the transverse brown stripes filled with light yellow stripes, sub-medially of tegmen with a large flavescent spot marked by 2 central transverse back lines. Wings brown, each side of A 2 with a longitudinal grayish narrowed band (Fig. 7F). Abdomen and terminalia brown. Type material. Holotype, male, China: 20 Apr. 1964, Yunnan, Xishuangbanna, Menglun, 650 m, coll. Baolin Zhang. Paratypes (8 males, 17 females, China): 1 male: 13 Jul. 1958, 650– 700 m, coll. Chunpei Hong; 2 males, 4 females: 21/ 30 Apr. 1974, coll. Yao Chou, Feng Yuan et Yinyue Hu; 1 female: 22 May 1982, 1 female: 24 May 1982, coll. Qinmei Wang et Jingruo Zhou; 1 male, 1 female: 18 May 1991, 1 female: 20 May 1991, 1 male, 1 female: 22 May 1991, 2 females: 26 May 1991, 3 males, 6 females: 31 May 1991, coll. Yinglun Wang et Wanzhi Cai; Yunnan, Xishuangbanna, Menglun. Distribution. China (Province Yunnan)., Published as part of Zhang, Huan, Wang, Wen-Qian, Stroiński, Adam & Qin, Dao-Zheng, 2021, Two new species and a new combination in the genus Ricanula Melichar, 1898 for Ricaniidae from China (Hemiptera: Fulgoromorpha), pp. 353-369 in Zootaxa 5047 (3) on pages 363-366, DOI: 10.11646/zootaxa.5047.3.7, http://zenodo.org/record/5540953

Ricanula pulverosa (Stål, 1865) (Figs 10–11) Ricania pulverosa Stål, 1865: 162; Stål, 1870: 767; Atkinson, 1886: 61; Noualhier, 1896: 256; Schmidt, 1905: 176; Distant, 1906: 380; Schumacher, 1915: 130; Melichar, 1898: 240; Esaki, 1932: 1805; Kato, 1933: 7; Zia, 1935: 537; Lallemand, 1942: 70; Jacobi, 1944: 22; Chou et al., 1985: 81. Ricanula pulverosa, Melichar, 1923: 130; Metcalf, 1955: 97; Yang, 1989: 193. Specimens examined. 1 male: 1 Jun. 1974, Yunnan, Xishuangbanna, Mengla, coll. Yao Chou et Feng Yuan; 1 male: 18 Apr. 1982, Yunnan, Xishuangbanna, Mengla, coll. Sumei Wang et Jingruo Zhou. Measurements. Length (inc. tegmen): male 7.8 mm. Remarks. First time after original description, Yang (1989) described and illustrated the male and female genitalia of the species based on Taiwan specimens. The morphological characters examined here are consistent with Yang’s (1989) description, but the male genitalia in this study show somewhat intraspecific variations as follows: 1) anal tube nearly rectangular in dorsal view (Fig. 10G) (irregularly hexagonal in Yang, 1989, Fig. 12G); 2) lateral processes of aedeagus reaching only 1/4 of the dorsal processes (Fig. 10I) (lateral processes reaching 1/2 of the dorsal processes in Yang, 1989, Figs 12H, I). Distribution. China (Provinces Shaanxi, Zhejiang, Yunnan, Fujian, Hainan, Taiwan), Cambodia, Myanmar, Thailand, Vietnam, Japan, India, Indonesia., Published as part of Zhang, Huan, Wang, Wen-Qian, Stroiński, Adam & Qin, Dao-Zheng, 2021, Two new species and a new combination in the genus Ricanula Melichar, 1898 for Ricaniidae from China (Hemiptera: Fulgoromorpha), pp. 353-369 in Zootaxa 5047 (3) on page 366, DOI: 10.11646/zootaxa.5047.3.7, http://zenodo.org/record/5540953, {"references":["Stal, C. (1865) Homoptera nova vel minus congita. Ofversigt af Kongliga Svenska Vetenskaps-Akadamiens Forhandlingar, 22, 145 - 165.","Stal, C. (1870) Hemiptera insularum Philippinarum. Bidrag till Philippinska oarnes Hemipter-fauna. Ofversigt af Kongliga Svenska Vetenskaps-Akademiens Forhandlingar, 27, 607 - 776. https: // doi. org / 10.5962 / bhl. title. 61898","Atkinson, E. T. (1886) Notes on Indian Rhynchota, No. 6. Journal and Proceedings of the Asiatic Society of Bengal, 55, 143 - 223.","Noualhier, J. M. (1896) Note sur les Hemipteres recoltes en Indo-Chine et offerts au Museum par M. Pavie. Bulletin du Museum national d'histoire naturelle, 10, 251 - 259.","Schmidt, E. (1905) Die Ricaniiden des Stettiner Museums. Entomologische Zeitung. Herausgegeben von dem entomologischen Vereine zu Stettin, 66, 168 - 198.","Distant, W. L. (1906) The fauna of British India, including Ceylon and Burma. Rhynchota. Vol. III (Heteroptera-Homoptera). Taylor and Francis, London, 503 pp.","Schumacher, F. (1915) Homoptera in H. Sauter's Formosa-Ausbeute. Supplementa Entomologica, 4, 108 - 142.","Melichar, L. (1898) Monographie der Ricaniiden (Homoptera). Annalen des K. K. Naturhistorischen Hofmuseums, 8 (2 - 3), 197 - 359.","Kato, M. (1933) Three colour illustrated insects of Japan. Fascicle 4. Homoptera: Fulgoridae and Others. Koseikaku, Tokyo, 127 pp.","Zia, Y. (1935) Note sur les Flatinae et les Ricaniinae de la chine du sud et du Tonkin (Homoptera Fulgoridae). Sinensia, 6 (5), 525 - 540.","Lallemand, V. (1942) Notes sur quelques especes recueillies par le R. Piel (Musee Heude, Shanghai) et le R. P. de Cooman (Hoa Binh, Tonkin). Notes d'Entomologie Chinoise. Musee Heude, 9 (4), 69 - 77.","Jacobi, A. (1944) Die Zikadenfauna der Provinz Fukien in Sudchina und ihre tiergeographischen Beziehungen. Mitteilungen der Munchner Entomologischen Gesellschaft, 34, 5 - 66.","Chou, I., Lu, J. S., Huang, J. & Wang, S. Z. (1985) Homoptera, Fulgoroidea. Economic Insect Fauna of China. Fasc. 36. Science Press, Beijing, 152 pp.","Melichar, L. (1923) Homoptera, fam. Acanaloniidae, Flatidae et Ricaniidae. Genera Insectorum. Part 182. L. Desmet-Verteneuil, Bruxelles, 185 pp.","Metcalf, Z. P. (1955) General catalogue of the Hemiptera. Fascicle IV. Fulgoroidea. Part 16. Ricaniidae. Smith College, Northampton, Massachusetts, 199 pp.","Yang, C. T. (1989) Ricaniidae of Taiwan (Homoptera: Fulgoroidea). In: Collected Papers on Fulgoroidea of Taiwan. Taiwan Museum Special Publication Series, 8, pp. 171 - 204."]}

Ricanula Melichar, 1898 Ricania (Ricanula) Melichar, 1898: 218. Ricanula Schmidt, 1912: 75. Type species. Ricania noualhieri Melichar, 1898, designated by Schmidt (1912). Remarks. Ricanula can be distinguished from other genera in Ricaniidae by the combination of following characters: costal area of tegmen with sparse and curved transverse veinlets; postero-apical part of tegmen with eyes-spot black cells; tegmen with one line of transverse veinlets; median and posterior parts of tegmen with numerous irregular transverse veinlets. Diagnostic characters. Head. Head including eyes narrower than mesonotum/thorax. Vertex transverse, distinctly wider than long at midline, with all margins well carinate; disc of vertex with or without median carina. Frons with all margins well carinated, at upper margin longer than high at midline, widest at the level of lower margin of compound eyes; lateral margins covering base of pedicel, not incised near the level of ocelli. Frontal disc tricarinate, carinae distinctly separated basally, median carina straight; lateral carinae arcuate, almost parallel to lateral margins. Fronto-clypeal suture arched/arcuate. Clypeus distinctly narrower than frons, without median carina. Compound eyes, with small callus in lower part of posterior margin. Ocelli present. Rostrum-apical segment shorter than subapical one. Antenna pedicel elongate, cylindrical, with functional area at the top. Thorax. Pronotum distinctly longer than vertex at midline; disc of pronotum with median carina and two lateral impressions. Mesonotum elongate, diamond shape, longer in midlength than wide at lateral angles and longer in midlength longer than combined length of vertex and pronotum at midlength; lateral angles placed before midlength; median carina, lateral and antero-lateral carinae present; median carina and lateral carinae connected basally; median carina reaching scutellum, lateral carinae reaching posterior margin, anterolateral carinae not connected with lateral and not surpassing level of lateral angles of mesonotum. Tegmina membranous, elongately-triangular, flattened, with distinct venation and transverse veinlets. Costal margin weakly arcuate, apical angle broadly rounded, placed distad to claval angle, posterior margin weakly sinuate, postclaval margin (tornus) absent. Costal area with transverse veinlets and oblique shallowly incisions; postero-apical part with eyes-spot black cells. Longitudinal veins ScP+RA, MP and CuA leaving basal cell separated. CuA vein first fork placed before the connection of claval veins Pcu+A 1. Tegmen with single apical line of transverse veinlets, median and posterior part of tegmen with numerous irregular transverse veinlets. Hind wing with precostal cell present; ScRA and MP forking distinctly after midlength of wing, CuA forking distinctly before half of wing. Hing legs. Metatibia with 2 lateral spines; apically with 6 well developed spines, external lateral spines bigger than internal lateral spines; basitarsomere of metatarsus a little longer than cumulative length of second and apical tarsomeres. Male terminalia. Anal tube with ventral margin strongly concaved in lateral view. Pygofer higher than wide; dorsal part narrower than ventral one. Genital styles broadly triangular (dorsal and ventral margins nearly parallel in R. fujianensis and R. cacaonis), with sharp spine-like process at the end of dorsal margin. Periandrium with or without processes, with long lateral split surpassing the half of its length; dorsal periandrium a bit shorter than ventral one. Aedeagus long and narrow, apically with 1–2 pairs of symmetrical, well sclerotized, spinose processes. Female terminalia. Pregenital sternite with well-developed lateral lobes, median portion of the posterior margin with or without processes. Anal tube not surpassing half of upper margin of the gonoplac. Gonoplac well developed, laterally flattened; posterior margin of the gonoplac with 2–3 rows of small teeth; membranous parts of gonoplac well developed, placed medially on ventral margin. Gonapophysis VIII sabre-like, v-shape in cross section, with teeth at dorsal margin; endogonocoxal process with spiniferous microsculptures, well sclerotized medially; lateral parts membranous, reaching apex of gonapophysis VIII. Gonaphophyses IX and gonospiculum bridge well developed. Bursa copulatrix with two isometric pouches: first pouch with well visible cell and sclerotized ornamentation; second pouch with numerous pores., Published as part of Zhang, Huan, Wang, Wen-Qian, Stroiński, Adam & Qin, Dao-Zheng, 2021, Two new species and a new combination in the genus Ricanula Melichar, 1898 for Ricaniidae from China (Hemiptera: Fulgoromorpha), pp. 353-369 in Zootaxa 5047 (3) on pages 354-355, DOI: 10.11646/zootaxa.5047.3.7, http://zenodo.org/record/5540953, {"references":["Melichar, L. (1898) Monographie der Ricaniiden (Homoptera). Annalen des K. K. Naturhistorischen Hofmuseums, 8 (2 - 3), 197 - 359.","Schmidt, E. (1912) Diagnosen neuer Fulgoriden-Gattungen und Arten nebst einigen Bemerkungen. Stettiner Entomologische Zeitung, 73, 67 - 102."]}

Ricanula curva sp. nov. (Figs 4–6, 11) Etymology. The name is derived from the Latin word ‘ curvus ’, referring to ventral processes of aedeagus being Scurved in lateral view; apical part of ventral processes of periandrium strongly curved laterally in dorsal and ventral view. Diagnosis. The species is similar to R. peronata sp. nov., but differs from the latter by having apical part of ventral processes of periandrium strongly curved laterally in dorsal and ventral view (R. peronata —ventral processes boot-shaped in ventral view); ventral processes of aedeagus S-curved in lateral view (R. peronata —ventral processes of aedeagus oriented ventrally in lateral view). Description. Measurements. Length (inclu. teg.): male 6.7–8.4 mm, female 7.2–9.6 mm. Head. Vertex (Figs 4A, C) with or without median carina. Frons: lateral carinae of frontal disc finishing basally at the same level as median carina, ending about the level of antennae. Thorax. Pronotum (Figs 4A, C) with small round depressions submedially on each lateral side (in some specimens weakly visible). Mesonotum: lateral carinae of mesonotum (Figs 4A, C) reaching posterior margin; anterolateral carinae connected with anterior margin. Tegmen: postero-apical part of tegmen with two eye-spot black cells, posterior margin almost straight. Longitudinal veins ScRA and RP arising as short common stem from basal cell, MP veins forked on basal cell. Claval veins Pcu and A 1 fused before midlength of CuP vein. Hind wing with r-m transverse veinlets present in distal part of wing (Fig. 4F). Hing legs: Basitarsomere of metatarsus with 8 apical teeth. Metatibiotarsal formula 2/6/8. Male terminalia (Figs 5A–B, 6A–I). Anal tube (in dorsal view, Fig. 5B) nearly as rectangle; posterior margin strongly concave, basal margin slightly convex, lateral margins straight; anus placed before midlength, paraproct slightly surpassing the posterior margin. Pygofer (in lateral view, Fig. 5A): dorso-posterior angle with process. Genital styles (Fig. 5A) broadly triangular in lateral view; ventral margin convex; dorsal margin weakly convex, with small concavity before spine-like process. Phallic complex (Figs 6A–C): Periandrium (Figs 6D–F) with ventral processes, apical part of ventral processes of periandrium curved laterally (in dorsal and ventral view), ventral periandrium distinctly convex in middle; dorsal periandrium with U-shaped structure with membranous apical part sclerotized base in dorsal view; lateral margin of periandrium with rod-shaped processes in lateral view. Aedeagus (Figs 6G–I) with two pairs of processes. Median split asymmetrical: ventral split present only in 1/5; dorsal split very deep, reaching almost basal part. All processes single armed: lateral processes longer than ventral processes, about 2/3 of aedeagus, curved dorsally at 2/3 of its length; ventral processes S-curved ventrally in lateral view. Female terminalia (Figs 5C–I). Pregenital sternite: posterior margin medially with two processes, margin between processes with strong and deep incision (Fig. 5I). Anal tube (in dorsal view, Fig. 5C) elongate, with posterior part wider than basal one; basal margin almost straight, posterior margin widely concave medially, lateral margins arcuate; anus placed a bit before midlength, paraproct surpassing the posterior margin. Gonoplac posterior margin with two rows of teeth. Coloration. General color brown to dark brown (Figs 4A–B). Lateral margins of frons yellow, area alongside frontoclypeal suture yellow, clypeus brown with yellow patch medially under frontoclypeal suture, rostrum yellowish with brown apex (Fig. 4D). Eyes (Fig. 4B) sordid brown, ornamented with irregular black brown patches. Gena (Fig. 4B) brown with two yellow spots. Tegmen (Figs 4A–B, E) brown to dark brown; costal margin with about 13–16 transverse brown stripes from base to a little beyond middle, between the transverse brown stripes filled with light yellow stripes, tegmen sub-medially with a large flavescent spot marked by 2 central transverse brown lines. Wings (Fig. 4F) brown, each side of A 2 with a grayish narrowed band longitudinally. Abdomen and terminalia brown. Type material. Holotype, male, China: 28 May 1982, Guangxi, Tianlin, Langping, coll. Jikun Yang. Paratypes (13 males, 21 females, China): 4 males, 2 females: 11 Apr. 1978, Guangxi, Baise, Yangwei, coll. Xianyu Qian; 1 male: 12 May 1980, Guangxi, Longzhou, Longhu, coll. Zhuyin Wang; 1 male: 17 May 1982, Guangxi, Longzhou, Nonggang, 240m, coll. Fasheng Li; 2 males: 29 May 1982, 1 female: 30 May 1982, Guangxi, Tianlin, Langping, coll. Jikun Yang; 1 female: 25 Jun. 1982, Guangxi, Longsheng, coll. Jikun Yang; 3 males, 14 females: 3 Jun. 1984, 1 female: 9 Jun. 1984, Guangxi, Lingtian commune, coll. Zhengliang Wu et Xiaolin Lu; 1 male, 1 female: 6 May 1993, 1 male, 1 female: 8 May 1993, Guangxi, Longzhou, Daqing Mountain, coll. Sikong Liu. Distribution. China (Province Guangxi)., Published as part of Zhang, Huan, Wang, Wen-Qian, Stroiński, Adam & Qin, Dao-Zheng, 2021, Two new species and a new combination in the genus Ricanula Melichar, 1898 for Ricaniidae from China (Hemiptera: Fulgoromorpha), pp. 353-369 in Zootaxa 5047 (3) on pages 359-363, DOI: 10.11646/zootaxa.5047.3.7, http://zenodo.org/record/5540953

Two new species of the genus Ricanula Melichar, 1898 within the family Ricaniidae (Hemiptera: Fulgoromorpha) from China are described and illustrated: R. curva sp. nov. and R. peronata sp. nov. Ricania cacaonis Chou et Lu, 1977 is redescribed and transferred to genus Ricanula. Ricanula pulverosa (Stål, 1865) is re-illustrated.

We have determined a mitochondrial genome of Ricania speculum (Walker, 1851) collected in Jeollabuk-do, Republic of Korea. The circular mitogenome of R. speculum is 15,530 bp long which is shorter than that of the previous mitogenome of R. speculum by 199 bp. It includes 13 protein-coding genes, two ribosomal RNA genes, and 22 transfer RNAs. Intraspecific variation between two mitogenome of R. speculum was investigated: 171 SNPs and 18 INDELs were identified, presenting a high level of intraspecific variations on mitochondrial genome.

Ricamela lata gen. et sp. nov. is described from the state of Bahia in Brazil based on a single female from L. Melichar’s collection in the Moravian Museum, Brno, Czech Republic. The new genus belongs to the subfamily Pharsalinae Gnezdilov of the family Ricaniidae Amyot et Serville and represents the third genus of this group. The systematic position of the American Ricaniidae are discussed. A key to genera of Pharsalinae is given.

To be effective, management strategies of invasive alien species cannot ignore their spatiotemporal behavior particularly those exerting serious damages to human activities. The black planthopper Ricania speculum is an Asian insect that has been reported as an alien invasive species in Italy, where it threatens local plant diversity, including important crops. In our work, we analyzed the activity rhythms of this species through circular statistics and the efficiency of chromotropic traps to capture adult individuals. Captures were carried out in central Italy, where the black planthopper is showing a remarkable range expansion, after its first discovery in 2009. We observed that the species was mainly crepuscular, with a high intersexual activity overlap. Activity rhythms changed between July–August and September–October, with changing heliophany, but peaked at sunset and were the lowest in the second half of the night and early morning. The insects were mostly caught by green traps, particularly in September, which is the period of egg-laying inside the leaves; conversely, orange ones were avoided, and yellow ones captured proportionally to their local availability. Strategies for controlling this species should consider concentrating trapping effort during the activity peak, using green sticky traps to enhance the capture success of each trap, with the lowest impact over non-target species.

An invasive planthopper, Ricania shantungensis, is an important pest in agriculture and forestry in Korea. Best target stage for insecticide application is known to be newly hatched first instar. Thus, the objective of the present study was to predict the occurrence of first instars of R. shantungensis. Effects of temperature on development and survival of R. shantungensis eggs were examined at seven constant temperatures (12.4, 16.4, 20.4, 24.8, 28.3, 32.4, and 36.9 °C). Development and survival of R. shantungensis eggs were quantitatively described by applying empirical models as a function of temperature over a wide thermal range. Lower developmental threshold, thermal constant, optimal developmental temperature, and upper developmental threshold were estimated to be 12.1 °C, 202 DD, 31 °C, and 36.9 °C, respectively. Survivorship was the highest at 23.3 °C. The models well predicted timing of field occurrences at three sites (Buyeo, Gwangyang, and Habcheon) in Korea. Therefore, results of this study would increase the prediction accuracy of R. shantungensis occurrence and management efficiency of R. shantungensis.

Pyemotid mites are parasitoids of various insects and are of potential as biocontrol agents. Three New Zealand new species of the genus Pyemotes are described in this paper: Pyemotes cumberi sp. nov. parasitic on Procecidochares utilis (Diptera: Tephritidae) in Auckland, Pyemotes martini sp. nov. parasitic on eggs of Scolypopa (Hemiptera: Ricaniidae) in the Northland, and Pyemotes mayae sp. nov. parasitic on scolytid larvae (Coleoptera) in Auckland. Keys to both adult males and females of these three new species are provided.

Two new species of ricaniid planthopper Ricanoides (Hemiptera: Fulgoromorpha: Ricaniidae) are described and illustrated: Ricanoides phiaoacensissp. nov. from Vietnam and Ricanoides srenoiensissp. nov. from Cambodia. Male and female external and internal genital structures of the new species are illustrated and discussed. Key for the identification of all species belonging to the genus based on male genital structures is given.

A new monotypic genus of ricaniid planthoppers (Hemiptera: Fulgoromorpha: Ricaniidae) from New Georgia Island (Solomon Islands), Kazukurugen. nov., is described for K. zingiberissp. nov. (type species). Habitus, female, external and internal genital structures of the new species are described and illustrated.

A new monotypic genus of ricaniid planthoppers (Hemiptera: Fulgoromorpha: Ricaniidae) from Namibia, Sensoricagen. nov., is described for S. namibiensissp. nov. (type species). Habitus, female, external and internal genital structures of the new species are described and illustrated.

A new genus of ricaniid planthopper (Hemiptera: Fulgoromorpha: Ricaniidae), Jeromicanusgen. nov., is described to comprise three species – two species from Vietnam Jeromicanus orientalissp. nov. (type species) and J. vietnamensissp. nov. and one species from Laos – L. laosensissp. nov. Habitus, male and female external and internal genital structures of the new species are illustrated.

The monotypic genus of ricaniid planthoppers (Hemiptera: Fulgoromorpha: Ricaniidae), LambertoniaLallemand, 1950 (type species – L. insignisLallemand, 1950) is redescribed and illustrated for the first time. Habitus, female external and internal genital structures are described and illustrated.

To explore the differences in mitogenome variation and phylogenetics among lineages of the Hemiptera superfamily Fulgoroidea, we sequenced four new mitogenomes of Caliscelidae: two species of the genus Bambusicaliscelis (Caliscelinae: Caliscelini), namely Bambusicaliscelis flavus and B. fanjingensis, and two species of the genus Youtuus (Ommatidiotinae: Augilini), namely Youtuus strigatus and Y. erythrus. The four mitogenomes were 15,922–16,640 bp (base pair) in length, with 37 mitochondrial genes and an AT-rich region. Gene content and arrangement were similar to those of most other sequenced hexapod mitogenomes. All protein-coding genes (PCGs) started with a canonical ATN or GTG and ended with TAA or an incomplete stop codon single T. Except for two transfer RNAs (tRNAs, trnS1 and trnV) lacking a dihydrouridine arm in the four species and trnC lacking a dihydrouridine stem in the Youtuus species, the remaining tRNAs could fold into canonical cloverleaf secondary structures. Phylogenetic analyses based on sequence data of 13 PCGs in the 28 Fulgoroidea species and two outgroups revealed that Delphacidae was monophyletic with strong support. Our data suggest that Fulgoridae is more ancient than Achilidae. Furthermore, Flatidae, Issidae, and Ricaniidae always cluster to form a sister group to Caliscelidae.

The genus Phanuromyia in the subfamily Telenominae (Hymenoptera: Scelionidae) consists of 60 described species, for which host records indicate they are egg parasitoids of lanternflies and planthoppers (Hemiptera: Auchenorrhyncha). In this study, we describe a new species of the genus, P. ricaniae sp. n., reared from the eggs of a planthopper, Ricania shantungensis Chou & Lu (Hemiptera: Ricaniidae). This planthopper has been considered as a serious invasive pest in South Korean agriculture. Ricania shantungensis has a wide host range, including economically important crops such as apple, peach, and pear. Phanuromyia ricaniae therefore has the potential to be a biological control agent against ricaniid planthoppers.

Ricaniidae Amyot & Serville, 1843 Ricaniinae Amyot & Serville, 1843 Lambertoniana nom.nov. type species Lambertonia insignis Lallemand, 1950 = Lambertonia Lallemand, 1950: 90 (type species Lambertonia insignis Lallemand, 1950) homonym of Lambertonia Kieffer, 1901: 159 (type species Lambertonia abnormis Kieffer, 1901; synonym of Omalaspis Giraud, 1860; Hymenoptera: Figitidae), Published as part of Dmitriev, Dmitry A., 2020, Nomenclatural changes in the suborders Auchenorrhyncha (Hemiptera) and Paleorrhyncha (Palaeohemiptera), pp. 25-53 in Zootaxa 4881 (1) on pages 44-45, DOI: 10.11646/zootaxa.4881.1.2, http://zenodo.org/record/4425714, {"references":["Lallemand, V. (1950 b) Contribution a l'etude des Homopteres de Madagascar. Memoires de l'Institut des Sciences de Madagascar, Series E, 4, 83 - 96.","Kieffer, J. J. (1901) Revision des Onychiinae D. T. (Cynipides). Bulletin de la Societe d'entomologique de France, 1901, 157 - 161."]}

Nomenclatural changes are proposed for numerous taxon names in the Insect orders Hemiptera and Palaeohemiptera. New replacement names are proposed for six genera, three subgenera, 55 species and six subspecies, additionally a homonymous name for a genus and eight homonymous names for species are substituted with the names of junior synonyms; 13 new synonyms are recognized; type species are fixed for four genera; 26 new combinations for species names are established.

Hagneia gen. nov. (Figs 1–68) Type species. Hagneia kallea sp. nov., here designated. Locus typicus (Figs 6–7). Vietnam, Province Cao B ằng, Nguyên Bình District, Nui Pia Oac Sud (22.594395, 105.885330). Etymology. Generic name is dedicated to my dearest best friend Agnieszka Gruszczyńska. Her given name derives from the Classic Greek ἁγνείη—(h)agnein, meaning pure, holy. Gender feminine. Diagnosis. Hagneia gen. nov. can be distinguished by the combination of following characters: frontal disc with 3 carinae separated basally; clypeus with median carina; mesonotum with 5 carinae; costal area wider than postcostal cell; longitudinal veins ScP+RA, MP and CuA leaving basal cell separated; posterior part of tegmen with 2 lines of transverse veinlets; basitarsomere of metatarsus shorter than cumulative length of second and apical tarsomeres, with not fully developed row of apical teeth: ventral apical part of basitarsomere with pad of strong setae; aedeagus with 3 symmetrical pairs of well sclerotized apical spinose processes; female posterior margin of the gonoplac smooth (without any teeth). Description. HEAD. Head with compound eyes (in dorsal view) narrower than mesonotum. Vertex (Figs1–5, 11–12, 14–15) transverse, with or without median carina, distinctly wider than long at midline, all margins well carinated. Frons (Figs 4, 15–16) with all margins well carinated; at upper margin longer than high at midline, widest at the level mid of compound eyes; lateral margins covering base of pedicel, incised near the level of antenna. Frontal disc with 3 carinae, distinctly separated basally; median carina distinctly surpassing half of disc, lateral carinae distinctly shorter, ending about the lower part of compound eyes (in some specimens weakly visible). Compound eyes with very small callus at postero-ventral margin and posterior margin. Ocelli present. Antenna (Figs 17–20): pedicel cylindrical, with functional area (trichoid sensilla type 1 and antennal plate organs) at the top and on the tip of frontal side surface. Clypeus (Figs15–16) distinctly narrower than frons, with median carina. Rostrum with apical segment a little shorter than subapical one. THORAX. Pronotum (Figs 1–5, 11–14) distinctly longer than vertex at midline; disc of pronotum with median carina and two lateral impressions. Mesonotum (Figs 1–5, 11–14) elongated, diamond shape, distinctly longer at midline than combined length of vertex and pronotum; median carina, lateral and antero-lateral carinae present; median carina and lateral carinae connected basally; median carina reaching scutellum, lateral carinae not reaching posterior margin; anterolateral carinae connected with lateral at the level of lateral angles, lateral angles placed before midlength. Tegmina (Figs 1–5, 21–26) membranous, elongately-triangular, flattened, with distinct venation and transverse veinlets. Costal margin weakly arcuate, apical angle broadly rounded, placed distad to claval angle, posterior margin arcuate; tornus absent. Costal area with dense transverse veinlets ending before tip of clavus; wider than postcostal cell, wider in basal half, tapering apicad and with wave shape apex. Costal cell narrower than costal area, with transverse veinlets, in some specimens weakly incomplete and weakly visible. Basal cell elongately oval, distinctly longer than wide (about 2 times). Longitudinal veins ScP+RA, MP and CuA leaving basal cell separated; all first forks of longitudinal veins placed distinctly before half of tegmen; veins ScRA and RP arising as short common stem from basal cell (vein forked just after leaving basal cell); first fork RP before first fork ScRA and after first fork of MP 1+2; common stem of MP 1+2 and MP 3+4 longer than ScRA but shorter than CuA; first fork of MP 3+4 closer than MP 1+2, in few specimens forks at about the same levels. CuA with protruded model of forking. Tegmen with 2 lines of transverse veinlets, apical and subapical cells distinctly longer than wide, apical one shorter than subapical; nodal line absent; median portion of tegmen with numerous irregular transverse veinlets. Cubital cell with transverse veinlets at basal part. Clavus closed; CuP ending at margin, in some specimens fused with the last branch of CuA, which is very variable (single or bifurcate, straight or curved); claval veins fused after midlength of CuP vein; posterocubital cell (basal and posterior part) and postcubital cell with well visible transverse veinlets. Hind wing with precostal cell present; ScRA and MP forking distinctly after midlength of wing, CuA forking distinctly before half of wing; rp-m, m-cua and icu transverse veinlets present in distal part of wing. Hing legs (Figs 27–32): metatibia distinctly longer than metafemur, partly flattened and widened at distal part; metatibia with 2 lateral spines placed distally to each other in distal part; apical row of teeth of metatibia with 7 well developed spines different in size; external lateral spines bigger than internal lateral spines; 5 internal spines different in size with asymmetrical diastema in formula 1+4 (with external spines formula 2 +5); basitarsomere of metatarsus shorter than cumulative length of second and apical tarsomeres, with not fully developed row of apical teeth: 2 lateral teeth equal in size and big and 3 internal small placed externally/asymmetry 1(2)1; ventral apical part of basitarsomere with pad of strong setae; mesotarsomere with pad of strong setae on ventral side. MALE TERMINALIA (Figs 33–48). Anal tube (in lateral view, Figs 33–34, 42) elongate, massive, distinctly surpassing posterior margin of pygofer; posterior part narrower than basal one; anus placed before midlength, ventral margin straight. Anal tube (in dorsal view, Figs 35–36, 39) elongate, subrectangular, widest about midlength; anus place before midlength, postero-ventral angle widely rounded; posterior margin in dorsal view with median concavity, lateral margins slightly arcuate. Pygofer (in lateral view, Figs 35–36, 39) higher than wide; dorsal part narrower than ventral one, dorso-posterior angle with well-developed process. Genital styles (Figs 35–38, 40–41), in lateral view, longer than wide with sharp spine-like process at the end of dorsal margin; apical part wider than basal; ventral margin almost straight (in lateral view), weakly sinuate in ventro-lateral view; dorsal margin weakly convex, with small concavity before spine-like process; caudo-dorsal angle widely rounded and surpassing the base of process, posterior margin weakly convex. Phallix complex (Figs 43–48): periandrium (Figs 43–45) without any processes, elongate, with long lateral split surpassing the half of its length; dorsal part of periandrium a bit shorter than ventral one, median part partly membranous, apically with median split; ventral part with widened apex and additional small lateral lobes. Aedeagus (Figs 46–48) long and narrow, apically with 3 pairs of symmetrical,, well sclerotized, spinose processes and short median split. Median split asymmetrical: ventral split present only in 1/4 ending with elongate triangular lobe; dorsal split very deep, reaching almost basal part. All processes single armed and oriented basad: dorsal processes biggest than other, distinctly curved in 1/3 of its length, posterior part with membranous ventral margin; median processes shorter, massive and fully sclerotized; ventral processes with small membranous part at basal part on dorsal margin, with little curved tip. FEMALE TERMINALIA (Figs 49–68). Pregenital sternite with well-developed and distinctly separated lateral lobes; posterior margin medially with processes (Figs 49–51, 61). Anal tube (in lateral view, Figs 55–57, 63) not reaching the posterior margin of gonoplac; anal tube (in dorsal view, Figs 53–54, 62) ovoid, wider before anus; anus placed a bit after midlength; anal style (paraproct) and anal segment (epiproct) short. Gonoplac (Figs 49–50, 55–60, 64) well developed, unilobate, laterally flattened; posterior margin of the gonoplac smooth (without any teeth); membranous part of gonoplac placed basally on ventral margin. Gonapophysis VIII (Fig. 65) sabre-like, “v” shape in cross section, with teeth at dorsal margin; endogonocoxal process tapering apicad, shorter than gonapophysis VIII, with median sclerotized core surrounded by membranous part. Gonaphophyses IX and gonospiculum bridge well developed, as in Figs 66–67. Bursa copulatrix (Fig. 68) of two pouches connected by narrow part; first pouch elongate, with cells and sclerotised ornamentation (except dorsal side); second pouch smaller, more oval than the first one, without cells but with sclerotized plates. Spermatheca (Fig. 68) well developed; ductus receptaculi elongate and narrow, ribbed; diverticulum ductus about as long as ductus receptaculi, with long narrow smooth ductus, apically with ovoid and smooth bulla. Distribution. Vietnam, Province Cao Bằng, Nguyên Bình District.

Hagneia kallea sp. nov. (Figs 1���68) Etymology. Specific epithet derives from Classical Greek ����������ς, ~ε��ς kallos, ~eos meaning good, beauty, noble. Diagnosis. Only one species in the genus. Male: dorso-posterior angle of pygofer with process oriented dorsad; female: pregenital sternite medially with 2 separated processes at posterior margin. Description. Total length 0.8���1.3 cm. HEAD. Vertex: proportion A/B = 9.6���11.25; all margins slightly elevated; in dorsal view, lateral margins almost straight and parallel; anterior margin widely arcuate, posterior margin with major curvature than anterior one. Frons: proportion C/E = 1.25���1.32; proportion D/E = 1.43���1.5; upper margin straight, lateral margins weakly arcuate, distinctly curved to frontoclypeal suture in lower part. Frontal disc delicately rugose vertically, near the frontoclypeal suture concave; lateral carinae of disc parallel to lateral margins (in some specimens weakly visible). Frontoclypeal suture widely arcuate. Clypeus with short median carina present in median part, surface of clypeus in median part weakly convex. Rostrum reaching mid coxae. THORAX. Pronotum: proportion F/B = 2.3���2.75; disc of pronotum delicately rugose; anterior margin widely arcuate; posterior margin weakly concave. Mesonotum: proportion G/F+B = 6.5���6.85, proportion G/F = 9.04���9.5, proportion G/H = 1.12.���1.19. Tegmina: proportion I/J = 1.41���1.47. Hind wing ScRA with 3 terminals, MP with 2���3 terminals, CuA wit 7���11 terminals. MALE TERMINALIA. Dorso-posterior angle of pygofer with process oriented dorsad; posterior margin in 3/4 straight, in 1/4 convex (lower part). FEMALE TERMINALIA. Pregenital sternite with posterior margin medially with 2 separated processes. COLORATION (Figs 1���5). Frons black with dark yellow lateral margins and narrow band alongside lateral margins. Clypeus and postclypeus medially dirty brown, lateral areas black; lateral part of head black with yellow narrow band alongside anterior margin and dark yellow patch around base of antenna. Compound eyes with irregular black and brown patches. Vertex black with lateral margins and narrow band alongside, lateral margins brown, pronotum (lateral lobes black with brown margin), mesonotum and tegulae black. Tegmina black with white tearshaped patch in middle and white-yellowish triangular patch near of end of costal area and huge transverse band alongside posterior margin. Hind wing with brown transverse band subapically posterior margin. Pro- and mesofemur on external and internal lateral side black, dorsally brown, pro-, mesotibia and tarsomeres brown. Metafemur, metatibia and metatarsus brown. Abdomen (male and females) black with brown narrow (dorsally) anterior margin (in females band bigger) of the tergites, ventral side of pygofer brown; terminalia black. Type material. Holotype, male: [Vietnam, Cao B ���ng Province, / Nguy��n B��nh District, / Phia Oac National Parc, / 22��35���39.8���N 105��53���07.2���E], [1282���1290 m a.s.l., 8��� 12.07.2019, / day and light trapping / leg. T. Bourgoin, J. Gunczy, G. / Kunz, A. Soulier and A. Stroiński]���deposited in MIZ. Praratypes, 6 ♂♂, 7 ♀♀: [Vietnam, Cao B ���ng Province, / Nguy��n B��nh District, / Phia Oac National Parc, / 22��35���39.8���N 105��53���07.2���E], [1282���1290 m a.s.l., 8��� 12.07.2019, / day and light trapping / leg. T. Bourgoin, J. Gunczy, G. / Kunz, A. Soulier and A. Stroiński]��� 5 ♂♂, 6 ♀♀ deposited in MIZ, 1 ♂, 1♀ deposited in MNHN. 4 ♀♀ preserved in MIZ were used for endosymbiotic studies and they lack abdomens. Distribution. Vietnam: Cao B���ng Province, Nguy��n B��nh District, Phia Oac National Parc��� 22��35���39.8���N 105��53���07.2���E (22.594395, 105.885330)., Published as part of Stroi��ski, Adam, 2020, Hagneia kallea gen. and sp. nov. (Hemiptera: Fulgoromorpha: Ricaniidae) from North Vietnam, pp. 241-256 in Zootaxa 4861 (2) on pages 250-255, DOI: 10.11646/zootaxa.4861.2.5, http://zenodo.org/record/4416200

A new monotypic genus of ricaniid planthoppers (Hemiptera: Fulgoromorpha: Ricaniidae), Hagneia gen. nov., is described for Hagneia kallea sp. nov. (type species). Habitus, male and female external and internal genital structures of the new species are illustrated.

Hagneia kallea sp. nov. (Figs 1–68) Etymology. Specific epithet derives from Classical Greek κάλλος, ~εος kallos, ~eos meaning good, beauty, noble. Diagnosis. Only one species in the genus. Male: dorso-posterior angle of pygofer with process oriented dorsad; female: pregenital sternite medially with 2 separated processes at posterior margin. Description. Total length 0.8–1.3 cm. HEAD. Vertex: proportion A/B = 9.6–11.25; all margins slightly elevated; in dorsal view, lateral margins almost straight and parallel; anterior margin widely arcuate, posterior margin with major curvature than anterior one. Frons: proportion C/E = 1.25–1.32; proportion D/E = 1.43–1.5; upper margin straight, lateral margins weakly arcuate, distinctly curved to frontoclypeal suture in lower part. Frontal disc delicately rugose vertically, near the frontoclypeal suture concave; lateral carinae of disc parallel to lateral margins (in some specimens weakly visible). Frontoclypeal suture widely arcuate. Clypeus with short median carina present in median part, surface of clypeus in median part weakly convex. Rostrum reaching mid coxae. THORAX. Pronotum: proportion F/B = 2.3–2.75; disc of pronotum delicately rugose; anterior margin widely arcuate; posterior margin weakly concave. Mesonotum: proportion G/F+B = 6.5–6.85, proportion G/F = 9.04–9.5, proportion G/H = 1.12.–1.19. Tegmina: proportion I/J = 1.41–1.47. Hind wing ScRA with 3 terminals, MP with 2–3 terminals, CuA wit 7–11 terminals. MALE TERMINALIA. Dorso-posterior angle of pygofer with process oriented dorsad; posterior margin in 3/4 straight, in 1/4 convex (lower part). FEMALE TERMINALIA. Pregenital sternite with posterior margin medially with 2 separated processes. COLORATION (Figs 1–5). Frons black with dark yellow lateral margins and narrow band alongside lateral margins. Clypeus and postclypeus medially dirty brown, lateral areas black; lateral part of head black with yellow narrow band alongside anterior margin and dark yellow patch around base of antenna. Compound eyes with irregular black and brown patches. Vertex black with lateral margins and narrow band alongside, lateral margins brown, pronotum (lateral lobes black with brown margin), mesonotum and tegulae black. Tegmina black with white tearshaped patch in middle and white-yellowish triangular patch near of end of costal area and huge transverse band alongside posterior margin. Hind wing with brown transverse band subapically posterior margin. Pro- and mesofemur on external and internal lateral side black, dorsally brown, pro-, mesotibia and tarsomeres brown. Metafemur, metatibia and metatarsus brown. Abdomen (male and females) black with brown narrow (dorsally) anterior margin (in females band bigger) of the tergites, ventral side of pygofer brown; terminalia black. Type material. Holotype, male: [Vietnam, Cao B ằng Province, / Nguyên Bình District, / Phia Oac National Parc, / 22°35’39.8”N 105°53’07.2”E], [1282–1290 m a.s.l., 8– 12.07.2019, / day and light trapping / leg. T. Bourgoin, J. Gunczy, G. / Kunz, A. Soulier and A. Stroiński]—deposited in MIZ. Praratypes, 6 ♂♂, 7 ♀♀: [Vietnam, Cao B ằng Province, / Nguyên Bình District, / Phia Oac National Parc, / 22°35’39.8”N 105°53’07.2”E], [1282–1290 m a.s.l., 8– 12.07.2019, / day and light trapping / leg. T. Bourgoin, J. Gunczy, G. / Kunz, A. Soulier and A. Stroiński]— 5 ♂♂, 6 ♀♀ deposited in MIZ, 1 ♂, 1♀ deposited in MNHN. 4 ♀♀ preserved in MIZ were used for endosymbiotic studies and they lack abdomens. Distribution. Vietnam: Cao Bằng Province, Nguyên Bình District, Phia Oac National Parc— 22°35’39.8”N 105°53’07.2”E (22.594395, 105.885330).