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Tachysphex nitidior de Beaumont, 1940 Fig. 15A–I Tachysphex nitidior de Beaumont, 1940: 175, ♀, ♁. Diagnosis. Body length: 6.5 mm. Male: Body wholly black (including antennae and legs) (Fig. 15A, B); mandible yellowish red mesally in most specimens (Fig. 15D); scutal and mesopleural sutures well-defined; fore femur with relatively large, glabrous and shiny notch (Fig. 15I); T 1–3 silvery fasciate posteriorly (Fig. 15G); gastral sterna with well-defined punctures. Material examined: 1♁, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Distribution: Azerbaijan, Bulgaria, Croatia, Egypt, France, Germany, Greece, Iran, Israel, Italy, Kazakhstan, Libya, Malta, Mongolia, Morocco, Portugal, Russia, Switzerland, Tunisia, Turkey, Turkmenistan, Ukraine, United Arab Emirates, Uzbekistan (Pulawski 2022), Saudi Arabia (new record). Comments. The characters of our male specimen agree well with de Beaumont’s key (1940: 162, couplet 30). It also agrees with Pulawski’s recognition (2007: 442).

Gastrosericus sanctus Pulawski in de Beaumont, Bytinski-Salz & Pulawski, 1973 Fig. 7A–G Gastrosericus sanctus Pulawski in de Beaumont, Bytinski-Salz & Pulawski, 1973: 16, ♀, ♁. Diagnosis. Male: body length: 7.0 mm. Body colour: see Fig. 7 (A–F). The male of this species shares with that of G. moricei the appressed genal (Fig. 7D) and propodeal pubescence (Fig. 7C); sternal fimbriae of S 3, S 4 noticeably long, slightly extending beyond posterior margin of sterna (Fig. 7E); gastral terga without yellow bands (Fig. 7A). It differs from that of G. moricei in the following: clypeal lobe broad, with arcuate to slightly sinuate free margin (Fig. 7B) and well-defined corner (obtusely pointed in G. moricei, see Pulawski 1995: 94, fig. 78f, h); S 3 and S 4 depressed medially (Fig. 7E), not fimbriate laterally (fimbriae of S 3 and S 4 present side to side, sterna not depressed medially, see Pulawski 1995: 95, fig. 79e, f). Material examined: 2 ♁, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Previous Saudi Arabian records: Abu Arish, Riyadh (Pulawski 1995). Distribution: Burkina Faso, Ghana, Israel, Ivory Coast, Kenya, Mali, Mauritania, Namibia, Niger, Oman, Pakistan, Saudi Arabia, Senegal, Somalia, South Africa, Tanzania, Togo, United Arab Emirates, Yemen, Zimbabwe. Comments. Characters of the collected specimens of this species agree with Pulawski’s key (1995: 23, couplet 24). It also agrees with Schmid-Egger & van Harten’s key (2022: 547, couplet 9), but gastral terga of male black, reddish brown posteriorly.

Genus Miscophus Jurine, 1807 Miscophus Jurine, 1807: 206. Type species: Miscophus bicolor Jurine, 1807, by monotypy.

Genus Gastrosericus Spinola, 1839 Gastrosericus Spinola, 1839: 480. Type species: Gastrosericus waltlii Spinola, 1839, by monotypy.

Solierella insidiosa de Beaumont, 1964 Fig. 11A–G Solierella insidiosa de Beaumont, 1964: 59, ♀, ♁. Diagnosis. Body length: 4.0 mm. Body colour: see Fig. 11 (A–F). Metanotum yellow; apex of median lobe of clypeus roundly projected, smooth and shiny (Fig. 11B); scutum densely finely punctate; punctures somewhat more spaced on scutellum, with more than a puncture diameter apart (Fig. 11C); metanotum smooth (Fig. 11C); depressed sides of scutellum densely finely pubescent; propodeum finely reticulate (Fig. 11A, C); mesepimeron with small rounded area smooth and shiny (Fig. 11D); fore and midfemora all black (Fig. 11E); fore and middle tibiae with small yellowish to whitish spot, hind tibia with whitish band along basal half dorsally. Material examined: 1♀, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Distribution: Saudi Arabia (new record), Spain, Syria, United Arab Emirates. Comments. This species is a new record for Saudi Arabia. Characters of the specimens collected from Farasan agree with de Beaumont’s key (1964: 55, couplet 5). It differs from the Syrian specimens of de Beaumont (1964: 59) in having the pale areas of body yellowish (whitish in the Syrian specimens). It also agrees well with Schmid-Egger’s key (2011: 582, couplet 4).

Genus Trypoxylon Latreille, 1796 Trypoxylon Latreille, 1796: 121, no included species. Type species: Sphex figulus Linnaeus, 1758, designated by Latreille, 1802.

Gastrosericus moricei E. Sauders, 1910 Fig. 6A–F Gastrosericus moricei E. Saunders, 1910: 529, ♁. Diagnosis. Body length: 7.5 mm. Body colour: see Fig. 6 (A–F). The female of this species shares with that of Gastrosericus sanctus the entire pygidial plate covered with dense, stout setae (Fig. 6F); appressed genal (Fig. 6C) and propodeal pubescence (Fig. 6D); the apical tarsomeres with one or more basoventral spines (spines lacking in some sanctus); gastral terga without yellow bands (Fig. 6A). It differs from G. sanctus by the following: free margin of clypeal lobe arcuate (Fig. 6B) (somewhat sinuate in most G. sanctus, see Pulawski 1995: 119, fig. 102a, b); the lobe free margin and the lip are simple (free margin slightly projecting close to lateral corners in G. sanctus, see Pulawski 1995: 120, fig. 103a, b); apical tarsomeres with one to four basomedian spines ventrally (0–2 spines in G. sanctus). Material examined: 1♀, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Previous Saudi Arabian records: Asir (Wadi Lasaba), Bahra, Riyadh (Pulawski 1995), Jeddah, Haddat Asham (Pulawski 1995; Gadallah & Assery 2004), Hutet Beni Tamim (10 km south of Riyadh) (Gadallah et al. 2013). Distribution: Algeria, Burkina Faso, Egypt, Gambia, India, Israel, Kazakhstan, Libya, Mali, Mauritania, Morocco, Niger, Oman, Pakistan, Saudi Arabia, Senegal, Somalia, Sri Lanka, Sudan, Thailand, Tajikistan, Togo, Tunisia, United Arab Emirates, Uzbekistan, Yemen. Comments. Characters of the only specimen collected agree with Pulawski’s key (1995: 19, couplet 18). It differs from the Arabian specimens in having femora black, pale yellow apically (in the Arabian specimens, femora reddish, pale yellowish apically, Pulawski 1995), but it resembles the Somalian females in having all femora black, yellow at tip (Pulawski 1995). This may be attributed to the fact that Farasan Archipelago belongs to the Afrotropical region.

Nysson arabicus Gadallah & Edmardash sp. nov. Figs 3A–D, 4A, B, 5A–C Type material: SAUDI ARABIA. Holotype (♁), Sala Mountain, 1186 m [17°04’10.5”N 43°07’43.3”E] (Abdul Rahman Al Jabri farm), 15.xi.2022, Malaise trap, on Coffea arabica, collector Usama Abu El-Ghiet. Description of male holotype: body length: 6.0 mm. Colouration (Figs 3A–C, 5A–C): Head and thorax black (except posterior margin of pronotum, tegula, and basal area of scutellum dark ferruginous), antenna with scape (except yellow ventrally), pedicel and the following 4–5 flagellomeres dark reddish brown, rest dark brown; mandible ferruginous with dark tip; abdomen: T 1 mostly dark ferruginous, with two yellow postero-lateral oval markings, posterior margin black; T 2 with thin, medially interrupted yellow band posteriorly; T 3 with broad band posteriorly, narrowly interrupted medially; T 4 and T 5 with complete broad yellow bands posteriorly, T 6 and T 7 entirely reddish; metasomal sterna mostly ferruginous, but S 1 mostly black, ferruginous at base; legs all ferruginous, with some yellow at tip of fore femur, and along whole length of hind tibia dorsally, hind tibia reddish ventrally, with black spurs. Fore wing slightly darkened, fumigated at apex, with dark brown veins. Head (Figs 3C, D, 4A). In dorsal view as broad as mesoscutum, densely rugulose-lacunose, with dense fine silvery pubescence laterally; vertex thin and sharp; frons densely foveolate, with sharp carina between antennal bases, with coarser silvery setae; clypeus with dense silvery setae, with about 4–5 rounded teeth at apex; antennae placed at an elevated tubercle, scape longer than wide, distinctly notched apically, pedicle cup-shape, all flagellomeres transverse, wider than long, last flagellomere longer than wide, 1.5× as long as its basal width, obliquely truncate at apex. Thorax (Figs 3A, B, 4B). Pronotum distinctly angulate antero-laterally, posterior margin coarsely punctate along ferruginous area; mesoscutum densely areolate, scutellum and metanotum densely areolate (except scutellum basally nearly smooth and shiny); scutellum with two indistinct teeth laterally, hardly seen because of the coarse foveolation of the integument; propodeum broadly strigate dorsally, with two pale sharp teeth postero-laterally; tegula with dense fine and shallow punctures; mesopleuron densely foveate, metapleuron transversely strigate, shiny; mesosternum densely foveolate. Legs normal, simple. Wings as in other Nysson species. Gaster (Figs 3A, B, 5B, C). Terga double-edged, T 1 irregularly punctate, with distinct spaces between punctures, punctures coarser and larger in the yellow areas; T 2 and T 3 with dense shallow punctures, alutaceous in between punctures; T 3 slightly elevated and smooth at base, together with the following two terga with punctures more distinct along yellow bands; terga narrowed towards apex; T 6 and T 7 densely foveolate along their whole areas, T 7 with two short spine-like processes, with rounded area in between; S 1 densely punctate with large spaces between punctures, sparsely setose; S 2 with large rounded hump (not tubercle) near to the middle, posterior margins of S 2–4 with fine punctures arranged in two or three rows; S 5 with dense coarse punctures throughout. Female: Unknown. Etymology. This species is named after the Arabian area where the specimen was collected. Distribution: Saudi Arabia (Alridah, Jazan). Comments. On the generic level, the double-edged gastral terga of the new species agree with Synnevrus A. Costa, 1859 (Guichard 1986; Nemkov 2001), however, in a cladistic analysis of the subfamily Bembicinae (based on morphological characters) carried out by Nemkov & Lelej (2013), this genus was synonymized with Nysson Latreille.Another opinion was that of W. Pulawski (pers. comm.), who attributed this to the presence of intermediate cases in some species. The genus is a new record to the Saudi Arabian fauna. The new species agrees with N. barrei (= Synnevrus barrei) in Nemkov’s key (2001: 4, couplet 4) in having two lateral small teeth on scutellum; pronotum sharply angulate antero-laterally (Fig. 4A, B); however, it differs from N. barrei in having thorax mainly black, with few areas ferruginous (Figs 3A, 4B) (thorax mainly ferruginous in N. barrei). Based on Radoszkowski (1893: 71), our male specimen differs from the male N. barrei in having posterior margin of prothorax dark ferruginous, not interrupted medially (Fig. 4A) (with ivory white band, interrupted medially in N. barrei); mesoscutum, scutellum (except ferruginous at base) entirely black (Fig. 4B) (reddish in N. barrei); T 1 with two postero-lateral oval yellow spots, posterior margins of T 2–5 with yellow bands, interrupted medially on T 2 (Figs 3A, 5C) (posterior margins of T 1–4 with ivory-white bands, interrupted medially in N. barrei); gaster ventrally mostly dark ferruginous, except basal two thirds of S 1 black (Fig. 5B) (S 2 reddish in N. barrei); fore wing slightly darkened, fumigated at apex (Fig. 5A) (transparent in N. barrei); only hind tibia along its whole dorsal side (all tibiae ivory white dorsally in N. barrei). On the other hand, the male N. arabicus somewhat agrees with the male N. ohli (Schmid-Egger 2011: 592) in having the sharply angulate antero-lateral sides of pronotum (Fig. 4A); the same body sculpturing (Fig. 3A); the presence of a median bulge between spines at apex of T 7 (Fig. 5C). However, it differs from N. ohli in the following combination of characters: body length 6.0 mm (4.0 mm in N. ohli); antenna with scape yellow ventrally (Fig. 3C) (whole antenna reddish, darkened apically in N. ohli); pronotum dark ferruginous posteriorly reaching dark ferruginous pronotal lobes (Fig. 4A) (light yellow in N. ohli reaching the dark reddish pronotal lobe); scutellum dark ferruginous at base (Fig. 4B) (clear yellow in N. ohli); T 2–5 with yellow bands posteriorly that is interrupted medially on T 2 (Figs 3A, 5C) (T 2 & T 3 with narrower lateral yellow spots, rest of terga black in N. ohli); sternal colour differs in the two species; terga medially without medial bulges (with small medial bulges in N. ohli); S 2 with a distinct, large rounded hump near to middle (absent in N. ohli); hind tibia broadly yellow dorsally (Fig. 3A) (all tibia with narrow light yellow over whole length dorsally in N. ohli). T 6 & T 7 entirely reddish (Fig. 5C) (T 6 partly and T 7 reddish in N. ohli).

Solierella nigridorsum Pulawski, 1964 Fig. 12A–F Solierella nigridorsum Pulawski, 1964: 136, ♀. Diagnosis. Body length: 3.6 mm. This species is characterized by the entirely black thoracic dorsum (Fig. 12A, C). Material examined: 1♀, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Distribution: Egypt, Iran, Saudi Arabia (new record), United Arab Emirates. Comments. This species is a new record for Saudi Arabia. Characters of the only collected specimen agree well with Pulawski’s description of the Egyptian females (1964: 136). It also agrees with the Arabian S. nigridorsum in having the metanotum completely black (Schmid-Egger 2011). Furthermore, it agrees with the Iranian female in having the pronotum and metanotum black (Schmid-Egger et al. 2021).

Abu El-Ghiet, Usama M., Gadallah, Neveen S., Gasib, Abdulmajeed M., Al-Fifi, Zarrag I. A., Edmardash, Yusuf A. (2023): Further addition to the crabronid fauna of Saudi Arabia (Hymenoptera: Apoidea (Spheciformes): Crabronidae), with new genera and species records, and the description of two new species. Zootaxa 5319 (2): 151-177, DOI: 10.11646/zootaxa.5319.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5319.2.1

Genus Solierella Spinola, 1851 Solierella Spinola, 1851: 349. Type species: Solierella miscophoides Spinola, 1851, by monotypy. This is the first record of the genus for the Saudi Arabian fauna.

Genus Tachysphex Kohl, 1883 Tachysphex Kohl, 1883: 166. Type species: Tachysphex filicornis Kohl, 1883 [= Tachytes fugax Radoszkowski, 1877], designated by Bingham, 1897: 192.

Tachysphex consocius Kohl, 1892 Fig. 13A–G Tachysphex consocius Kohl, 1892: 217, ♀. Diagnosis. Body length: 7.0 mm. Body, including legs and antennae, black (Fig. 13A); pygidial plate reddish apically in some females; mandible reddish medially, black at base and apex (Fig. 13B); labrum flat, concealed under clypeus; middle clypeal section of female convex (Fig. 13B), with one lateral incision, free margin sinuate; postocellar area with erect setae; mid tarsomere II more than twice as long as apically wide (Fig. 13A); mesopleuron distinctly punctate, punctures minute; propodeal dorsum irregularly rugose or irregularly ridged (Fig. 13C); gastral T 1–4 silvery fasciate apically (Fig. 13A); dorsal length of female flagellomere I about 2.3 × apical width; outer apical spine of male foretarsomere II longer than foretarsomere III. Material examined: 2♀, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Previous Saudi Arabian records: Fayfa (Pulawski, 2007). Distribution: Widely distributed in Africa, southern Europe to Central Asia and India and Sri Lanka. Comments. Characters of this species agree with Pulawski’s key (2007: 49, couplet 103), as well as the diagnosis recognizing the species in Pulawski (2007: 208).

Tachysphex fugax (Radoszkowski, 1877) Fig. 14A–F Tachytes fugax Radoszkowski, 1877: 30, ♁. Diagnosis. Body length: 7.0 mm. Body entirely black (including antennae and legs) (Fig. 14A–C, E); clypeal lobe flat, with at most a rudimentary bevel in female, angulate laterally in male; labrum greatly concealed by clypeus; antennal flagellomeres elongate, distinctly longer than broad, without sensory areas (Fig. 14B, C); length of flagellomere IV 4.0–4.5× apical width in female and 2.2–2.8× in most males; frons punctatorugose; mesoscutum and mesopleuron densely punctate (Fig. 14C, D), with puncture one diameter apart, much denser posteriorly at junction with scutellum; propodeum longitudinally ridged, setae directed obliquely anterad (Fig. 14D); hind coxa more or less expanded at base dorsally; bottom of male fore femoral notch glabrous, microscopically ridged; outer margin of fore basitarsus in most males with 3–5 rake spines; outer apical spine of male tarsomere II no longer than tarsomere III; T 1–3 with apical silvery fasciae (Fig. 14A). Material examined: 1♀, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022. Previous Saudi Arabian records: Adriyah, El Riyadh, Fayfa, South Jeddah, Wadi Maraba (Pulawski 2007). Distribution: Algeria, Angula, Austria, Azerbaijan, Botswana, Bulgaria, Burkina Faso, Burundi, Canary Islands, Central African Republic, Comoro Islands, Croatia, Cyprus, Democratic Republic of the Congo, Egypt, Ethiopia, France, Georgia, Greece, Guinea, Hungary, Israel, Italy, Ivory Coast, Kazakhstan, Kenya, Lesotho, Madagascar, Mali, Malta, Morocco, Mozambique, Namibia, Portugal, Romania, Russia, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Lione, Somalia, South Africa, Spain,? Switzerland, Syria, Tanzania, Tunisia, Turkey, Ukraine, Uzbekistan, Zimbabwe. Comments. Characters of the only female collected from Farasan agrees well with Pulawski’s key (2007: 48, couplet 98).

Ammatomus yemenensis Schmid-Egger, 2019 Fig. 2A–F Ammatomus yemenensis Schmid-Egger, 2019: 448, ♀, ♁. Diagnosis. Body length: 8.0 mm. This species is diagnosed by the following characters: gastral T 1 distinctly petiolate, with distinct constriction between T 1 and T 2 (Fig. 2A); metanotum ivory, smooth; T 2–4 with complete ivory bands (Fig. 2A); T 1 about 1.5× as long as apical width, with two large posterolateral ivory markings a short distance apart, remainder black, posterior margin translucent; S 2 with two small triangular ivory markings posterolaterally (Fig. 2E); hind tarsomeres I–III all yellowish to whitish (Fig. 2A, E); hind claws black (Fig. 2E); T 1 without or with indistinct lateral carina. Male: Not available. Material examined: 1♀, Farasan Island Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022 Distribution: Yemen (Schmid-Egger 2019), Saudi Arabia (new record). Comments: Ammatomus yemenensis Schmid-Egger from the Farasan Archipelago is a new record for Saudi Arabia. The characters of the only specimen collected agree well with A. yemenensis in Schmid-Egger’s key (2019: 440, couplet 11). It differs from the Yemeni female in having the pale parts of body ivory white (whitish yellow in Yemeni specimens); antennal flagellum entirely black except last two flagellomeres reddish beneath (AS 1–3 yellowish white in Yemeni specimens); T 1 1.29× as long as mesoscutum (1.1× mesoscutum in Yemeni specimens). It also agrees with Schmid-Eggers’ (2019: 456, figs 41–44).

Genus Nysson Latreille, [1802] Nysson Latreille, [1802: 340]. Type species: Crabro spinosus Fabricius, 1775 [= Sphex spinosus J. Forster, 1771], designated by Schuckard, 1837. This is the first record of the genus for the Saudi Arabian fauna.

Genus Ammatomus A. Costa, 1859 Ammatomus A. Costa, 1859: 36. Type species: Gorytes coarctatus Spinola, 1808, by monotypy. This is the first record of the genus for the Saudi Arabian fauna.

Trypoxylon splendidum Antropov, 2011 Fig. 16A–G Trypoxylon splendidum Antropov, 2011: 610, ♀, ♁. Diagnosis. Body (including antennae and legs) entirely black (Fig. 16A); frontal shield in female and male relatively long, pointed, a short distance above antennal bases, rounded basally and angulate apico-laterally, coarsely rugose in female (Fig. 16B), densely punctate in male (Fig. 16C), with an area of silvery pubescence extending from middle ocellus but not reaching ventral end of shield (Fig. 16B, C); last antennal segment in male relatively long, narrowly rounded apically, about as long as preceding three antennal segments or slightly shorter (Fig. 16G); scutum with dense superficial punctures (Fig. 16D), mesopleuron densely punctate, with interspaces (Fig. 16E); metapleuron finely transversely striate (Fig. 16E); dorsal enclosure of propodeum coarsely rugose, with dense, upturned fine pale setae posteriorly (Fig. 16D); first gastral segment distinctly long in both sexes (Fig. 16F); S 8 of male completely as in Antropov (2011: 615, fig. 10). Material examined: 2♀, 1♁, Farasan, Abdulmajeed farm [16 Q 42.07970’N; 42 Q 08.5781’E], 23–30.ix.2022; 1♀, Farasan (Abdulmajeed Farm), 30.ix–7x.2022. Previous Saudi Arabian records: Maha’il (Antropov 2011), Jazan (Gadallah et al. 2021). Distribution: Egypt, Israel, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, United Arab Emirates. Comments. Characters of this species fully agree with Antropov’s key (2001: 616, couplet 3), as well as his diagnosis (2011: 610).

Miscophus sauditus Gadallah & Edmardash sp. nov. Figs 8A–E, 9A–D, 10A–E Type material: SAUDI ARABIA. Holotype (♁), Farasan [16° 41.8’ N; 42° 7.3333’ E], 23–30.ix.2022. Description of male holotype: body length: 7.0 mm. Colouration: head and thorax black with cuprous to dark green luster (Figs 8A, B, 9A, B); red: gaster (Figs 8A, 9C, D), tegula (Figs 8A, 9A) and legs (except coxae externally black) (Fig. 8A); scape and pedicel yellowish, darker above (Fig. 8B–D); flagellum wholly black (Fig. 8B–D); apical margin of clypeus ferruginous (Fig. 8C), mandible ferruginous with black tip; forewing membrane hyaline to subhyaline, with a transverse fumigate area subapically (not reaching wing apex), veins dark brown (Fig. 10E). Head (Fig. 8A–E): face above antennal sockets and clypeus densely clothed with silvery pubescence concealing underlying integument (Fig. 8C); upper face with less pubescence, not concealing integument, densely punctaterugose (Fig. 8C); eye orbit slightly concave above, convex below (Fig. 8C); clypeus medially with apex slightly arcuate (Fig. 8C); last three flagellomeres depressed dorsally (Fig. 8E); middle ocellus distinctly larger than lateral ocelli (Fig. 8B); AS 3 2.5× as long as its apical width (Fig. 8E), distinctly longer than pedicel. Thorax (Fig. 9A, B): pronotum well-developed, with slight longitudinal sulcus medially (Fig. 9A); mesoscutum densely punctate, with indistinct short sulcus antero-medially (Fig. 9A); scutellum densely punctate, glabrous (Fig. 9A); propodeum with dense silvery pubescence especially laterally, densely granulate (Fig. 9A), transversely punctate posteriorly; propleuron with dense silvery pubescence concealing underlying integument (Fig. 9B); mesopleuron with such pubescence anteriorly and medially, remainder smooth and shiny (Fig. 9B); legs (Figs 8A, 9B): fore coxa with two longitudinal carinae externally, depressed in between; fore basitarsus long and slender, as long as following tarsomeres combined, with four black unequal spines, of which basal one is very short, apical spine is the longest, about as long as following tarsomere; spines of tarsal comb thin (not spatulate); fore femur with wavy silvery pubescence ventrally; mid and hind tibiae irregularly spinose. Gaster (Figs 9C, D, 10A–C) impunctate, terga with fine silvery, short pubescence laterally (Figs 9C, 10A); T 6 conical, broad and convex at base, with numerous short, black spines along lateral margins (Fig. 10A, B); S 3–6 each with a row of black spines posteriorly, increasing in number toward apex (Fig. 9D), S 8 with two long spines curved along almost their whole length, parallel-sided at apex (Fig. 10C); gonoforceps (Fig. 10D) narrowly rounded apically, with dense, long setae at basal two-thirds, distinctly bent medially (Fig. 10D). Female: Unknown. Etymology: This species is named after the Kingdom of Saudi Arabia where the specimen was collected. Distribution: Known only from Saudi Arabia (Farasan Archipelago). Comments. The new species belongs to Miscophus helveticus group based on Schmid-Egger & El-Jahdhami’s key to males species-groups (2022: 324, couplet 3) in having erect whitish pilosity on gena (Fig. 8D, E), and S 8 bidentate (Fig. 10C). It greatly resembles the male of M. papyrus de Andrade, but differs from it in the following: clypeus slightly arcuate (Fig. 8C) (clypeus mesally pointed at apex in M. papyrus, Pulawski 1964: 124, fig. 62); propodeal dorsum densely granulate (striate in M. papyrus; Pulawski 1964); gaster entirely red (T 4 and T 5 clearly brownish in M. papyrus; Pulawski 1964); S 8 with two long spines curved along almost their whole length, parallel-sided at apex (Fig. 10C) (spines parallel-sided throughout in M. papyrus, see Pulawski 1964: 123, fig. 63); gonoforceps with dense long setae that are distinctly bent medially (Fig. 10D) (bent at apex in M. papyrus; see Pulawski 1964: 123, fig. 64). It also resembles M. ctenopus Kohl in having posterior ocelli closer to each other than the distance between each of them and the posterior ocellus (Fig. 8B); radial cell distinctly larger than the petiolate SMC 2 (Fig. 10E). However, it differs from M. ctenopus in the following (based on Kohl’s key to males, 1885: 221, couplet 2): mesoscutum dorsally with noticeable side corners in M. ctenopus (side corners gently rounded in M. sauditus, Fig. 9A); fore wing in M. ctenopus light, heavily clouded at tip margin (in M. sauditus fore wing more or less subhyaline, heavily clouded subapically, Fig. 10E); gaster bright red, except brownish medially in M. ctenopus (in M. sauditus gaster entirely red, Figs 8A, 9C, D). Based on de Andrade (1954): M. sauditus differs from the male M. ctenopus in the following aspects: free margin of clypeal lobe normal (Fig. 8C) (depressed medially and slightly raised at the sides in M. ctenopus); spines of tarsal comb thin (not spatulate) (spatulate in M. ctenopus); lower edge of the apical zone of gonoforceps distinctly curved (Fig. 10D) (not markedly curved in M. ctenopus, see de Andrade (1954: 11, fig. 25)); gonoforceps with dense long setae that are distinctly bent or curved medially (Fig. 10D) (somewhat irregularly wavy in M. ctenopus; see de Andrade 1954: 11, fig. 25).