Discovery of the spider wasp genus Telostholus Haupt, 1929 (Hymenoptera Pompilidae) in Laos, with the description of three new species Author Loktionov, Valery M. text Zootaxa 2021 2021-05-03 4966 2 226 236 journal article 6527 10.11646/zootaxa.4966.2.9 f80a0e1a-811b-44a1-9929-574b79cfcb95 1175-5326 4736577 FC9B56B9-4346-4046-8E72-47A11BF838AB Telostholus leleji Loktionov , sp. nov. ( Figs 18–25 , 32–34 ) Material examined . Holotype , ♂ “LAO, Prov. Hua Phan , Phou Pan , Umg. Ort Ban Saleui, 20°13’30’’ N , 103°59’26’’ E , 1350–1900 m , 15.04.2012 KJa, leg. C. Holzschuh & locals” [ Laos : Houaphanh Prov. ] [OLL]. Diagnosis . Male . The male of this new species can be distinguished from those of other congeners by the following combination of characters: (1) the fore wing with apical and subbasal brown bands ( Fig. 24 ); (2) F2–F10 not crenulated, but somewhat convex ventrally ( Fig. 18 ); (3) the volsella broad, oval-shaped, its ventral face along outer margin with bristles ( Fig. 32 ); (4) the hypopygium in ventral view slightly narrowing medially and broadening preapically ( Fig. 34 ). Female . Unknown. Description . MALE. Length: body 10.6 mm ; forewing 9.5 mm . Head width 1.15 times its height; MID 0.63 times head width in frontal view ( Fig. 20 ). Ocelli large, slightly raised; ocellar triangle obtuse-angled; POD: OOD = 1.2 ( Fig. 22 ). Head in frontal view with vertex slightly roundly produced above dorsal eye margin ( Fig. 20 ). Posterior margin of vertex in dorsal view slightly concave ( Fig. 22 ). Head in lateral view with frons convex ( Fig. 21 ). Temple in dorsal view slightly developed ( Fig. 22 ). Gena in profile narrow ( Fig. 21 ). Malar space short ( Fig. 21 ). Clypeus barely convex, its width 2.5 times its height, and 0.8 times LID; anterior margin straight; anterolateral corner rounded. Mandible slender, with stout subapical tooth. Labrum well exposed, its anterior margin broadly rounded. Maxillary palps 2–5 about same length, palp 6 slightly longer than others. Flagellum somewhat stout; scape normal shaped; F2–F10 not crenulated, but somewhat convex ventrally ( Fig. 18 ); ratio of scape, pedicel and F1–11 length (on ventral side) 31: 12: 35: 34: 35: 35: 35: 33: 32: 30: 28: 28: 31; scape length 0.4 times UID; F1 length 2.21 times its maximum width, and 0.39 times UID; apical flagellomere pointed apically. Mesosoma . Pronotum length in dorsal view 0.47 times its maximum width; anterior face not differentiated from dorsum; posterior margin rounded and somewhat subangulate medially ( Fig. 22 ). Dorsum of mesoscutum slightly convex. Dorsum of mesoscutellum and metanotum noticeably convex. Metapostnotum noticeably depressed, barely emarginated postero-medially, its length 0.2 times metanotum length medially. Propodeum length in dorsal view 0.63 times its maximum width; dorsum in lateral view weakly convex; posterior face somewhat differentiated from dorsum ( Fig. 23 ). Legs . Profemur without spines. Protibia: short spines on inner lateral face, tree long spines ventrally, and few different-length spines apically. Protarsomere 1 with three longitudinal rows of short spines ventrally. Protarsomeres 2 and 3 with few short spines ventrally. Protarsomeres 4 and 5 without spines ventrally. Protarsomere 1 length 1.1 times length of protarsomere 2–4 combined. Protarsomere 5 in dorsal view symmetrical, its length 2.3 times its maximum width. Mesofemur with 5–6 short spines dorso-apically. Metafemur with 5–7 spines dorso-apically. Mesotibia with elongate rows of long spines. Metatibia with elongate rows of long spines and one row of short spines dorsally. Metatibia longer spur length 0.69 times metatarsomere 1 length. Meso- and metatarsomere 1 with scattered spines shorter than on mesotibia. Meso- and metatarsomeres 2–4 with short spines ventrally. Meso- and metatarsomere 5 without spines ventrally. Tarsal claws of all legs symmetrical and bifid, inner tooth long, broad, and obliquely truncated apically. Wings . Fore wing ( Fig. 24 ) translucent, with brownish apical and subbasal bands; apical band with subapical light area just beyond second submarginal cell. Pterostigma brown, its length 5.6 times its height (on inner distance), and 2.0 times Rs 2 . Second submarginal cell length 2.75 times its maximum height, narrowed on vein Rs by 0.55 times its own length on vein M , receiving crossvein 1m-cu at basal 0.27 and receiving crossvein 2m-cu at basal 0.83. Crossvein 3rs-m strongly arched. Crossvein cu-a weakly arched, originating just beyond separation of vein M+CuA . Vein M not touching wing margin. Hind wing ( Fig. 25 ) translucent, with brownish apical portion; crossvein cu-a evenly arched and hardly anterofurcal. Metasoma in dorsal view lanceolate, slightly narrower than mesosoma. Genitalia ( Figs 32, 33 ); paramere pad- dle-shaped, broad and long, curved and pointed apically, its outer margin with long bristles; apical part of volsella oval-shaped, its ventral face along outer margin with dense erect curved bristles ending at top with inconspicuous small ball; parapenial lobe in upper half somewhat crescent-shaped, with broadly rounded apex. Hypopygium ( Fig. 34 ) apical half flat in lateral view; slightly narrowing medially and broadening preapically, with barely emarginated apical margin in ventral view; ventral face in apical portion with thin erect setae. S6 was damaged during extruding of genitalia and hypopygium, so its characters are unknown. Sculpture . Head, meso- and metasoma matte, except frons somewhat polished, mandible apically polished. Body with inconspicuous microsculpture. Frons finely and densely punctate, median line slightly depressed. Metapostnotum with transverse striae. Dorsum of propodeum gently densely punctate. Antenna matte. Legs matte, except metafemur inner surface polished. Colour and pubescence . Body black ( Figs 18, 19 ). Apical half of mandible dark brown. Claws dark brown. Body without setae except following: gena, propleura, and propodeum postero-laterally with scattered gray erect setae; mandible with few thick brown setae; S2–S5 with few pale setae. Body with sparse gray pubescence, most intensive on lower face, and propodeum postero-laterally. FIGURES 18–25 . Telostholus leleji sp. nov . , ♂ (holotype). 18 and 19, habitus (18, in lateral view; 19, in dorsal view). 20, head in frontal view. 21, head and pronotum part. in lateral view. 22, antenna part., head, pronotum, and mesoscutum part in dorsal view. 23, mesosoma part. and T1 in dorso-lateral view. 24, fore wing. 25, hind wing. Scale bar: 1.0 mm for 18, 19, 24, 25; 0.5 mm for 22, 23; 0.2 mm for 20, 21. FIGURES 26–34 . Male genitalia and pregenital segments. 26–28, Telostholus kubani sp. nov . (paratype); 29–31, Telostholus lao sp. nov . (paratype); 32–34, Telostholus leleji sp. nov . (holotype). 26, 27, 29, 30, 32, 33, genitalia (26, 29, 32, in ventral view; 27, 30, 33, in dorsal view). 28, 31, 34, S7 and S8 (hypopygium), in ventral view. Scale bar: 0.2 mm for 32–34; 0.1 mm for 26–31. FEMALE. Unknown. Distribution . Laos ( Houaphanh Prov. ). Etymology . The specific epithet is a pathronym honoring Prof. Arkady Lelej (FSC Biodiversity FEB RAS, Vladivostok, Russia ), my scientific advisor and inspirer, on the occasion of his 75 th birthday.