Taxonomic revision of the genus Loboscelidia Westwood, 1874 (Hymenoptera: Chrysididae: Loboscelidiinae) from Vietnam Author Hisasue, Yu D2E20D5E-B406-4169-9B1D-A4D0078D06EE Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, Fukuoka, 819 - 0395, Japan. & Ogasawara Division of Japan Wildlife Research Center, Okumura, Chichijima, Ogasawara, Tokyo 100 - 2101, Japan. hybrizonist@gmail.com Author Pham, Thai-Hong B226B19B-509B-4878-B2FD-8505B688A1D2 Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology (VAST), 321 Huynh Thuc Khang, Hue, Vietnam. & Graduate School of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam. phamthai@vnmn.vast.vn Author Mita, Toshiharu 6CC49F2C-C91C-463C-9C2D-8269588E1A6A Entomological Laboratory, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819 - 0395 Japan. t3mita@agr.kyushu-u.ac.jp text European Journal of Taxonomy 2023 2023-08-04 887 1 1 68 http://zoobank.org/788ae14a-0698-4c42-819c-bc2412f76fca journal article 60724 10.5852/ejt.2023.887.2203 e07425be-9a2c-4459-aa8b-b51c90eafc0f 2118-9773 8222523 788AE14A-0698-4C42-819C-BC2412F76FCA Loboscelidia vang sp. nov. urn:lsid:zoobank.org:act: 7FEE8B5C-8DED-4602-9418-E60F91693BC3 Figs 23 , 25P Etymology The specific name is derived from the Vietnamese word ‘vàng’ meaning ‘yellow’, referring to the yellowish body color. Type material Holotype VIETNAM • ♂ ; Bac Giang Province , Tay Yen Tu NR ; 21°10′52.33″ N , 106°43′24.3″ E ; 8 Jul. 2014 ; K. Tsujii leg.; VNMN . Paratype VIETNAM • 1 ♂ ; same collection data as for holotype but 9 Jul. 2014 ; T. Mita leg.; VNMN . Description Male ( Fig. 23A ) MEASUREMENTS . Body length 3.1 mm ; forewing length 3.2 mm . HEAD . Head ( Fig. 23B–D ) 1.8 times as long as high, as long as wide; inner ocular length 0.61 times as long as head width; frontal projection triangular in frontal view ( Fig. 23B ); apical margion of frontal projection depressed ( Fig. 23C ); frons polished and unpunctured; frons with low ridge extending from vertex along inner orbit of eye ( Fig. 23C ); frons with distinct carinae towards median ocellus ( Fig. 23C ); frons with indistinct frontal line ( Fig. 23C ); spraclypeal area with transverse carinae ( Fig. 23B ); temple 1.6 times as long as MOD ( Fig. 23C ); POL 1.4 times as long as MOD; OOL 0.96 times as long as MOD; LOL 0.40 times as long as MOD; behind ocelli with transverse depression ( Fig. 23C ); cervical expansion strongly convex in lateral view ( Fig. 23D ); basal part of cervical expansion strongly constricted in dorsal view ( Fig. 23C ); scape 3.8 times as long as wide; scape with longitudinal grooves; scape with transparent flange; F1 1.8 times as long as wide; F2 1.7 times as long as wide; F11 3.5 times as long as wide; relative length of F1–F11: 1.0: 1.2: 1.1: 1.1: 1.1: 1.1: 1.1: 1.2: 1.2: 1.2: 1.7. MESOSOMA . Pronotum 0.81 times as long as posterior width of pronotum ( Fig. 23F ); posterior width of pronotum 1.5 times as wide as anterior width and as wide as head width; dorsolateral surface of pronotu carinate ( Fig. 23A ); notauli of scutum parallel, reaching posterior margin ( Fig. 23G ); scutellum polished and punctured ( Fig. 23G ); apico-lateral area of scutellum without longitudinal grooves ( Fig. 23G ); metanotum with medial ridge ( Fig. 23G ); scrobal sulcus present, strongly depressed ( Fig. 23A ); metanotum 0.52 times as long as scutellum ( Fig. 23G ); propodeal angle weakly developed; propodeum without transverse carina above foramen. WINGS . Forewing ( Fig. 23E ) with M straight; cu-a absent; A extending Cu+M; R1 0.44 times as long as R; Rs 1.9 times as long as R. LEGS . Tibiae carinate; flange on forefemur 0.53 times longer, 0.85 times wider than tubular part of forefemur; flange on foretibia 0.40 times longer, 0.43 times wider than tubular part of foretibia; flange on midfemur 0.49 times longer, as wide as tubular part of midfemur; flange on midtibia 0.72 times longer, 0.25 times wider than tubular part of midtibia; hindcoxa 2.2 times as long as hind trochanter; hindcoxa dorso-laterally carinate; basal part of hindfemur strongly producing; hindfemur basally stout, apparently wider than distal part; ventral margin of hindfemur flat; outer surface of hindfemur smooth; flange on hindfemur 0.43 times longer, 0.83 times wider than tubular part of hindfemur; flange on hindtibia 0.57 times longer, 0.55 times wider than tubular part of hindtibia; hind tarsal claw with one median tooth, reaching tarsal claw ( Fig. 25 ). PILOSITY . Lower gena with sparse suberect simple setae ( Fig. 23D ); cervical expansion without setae ( Fig. 23C ); scape with sparse suberect simple setae; pedicel with sparse suberect simple setae; lateral surface of pronotum with sparse suberect simple setae ( Fig. 23A ); forecoxa and foretrochanter with sparse suberect simple setae; foretrochanter with sparse suberect simple setae; midcoxa and midtrochanter with sparse suberect simple setae; midfemur and midtibia with sparse decumbent and suberect simple and cuneate setae; hindcoxa with sparse decumbent simple setae; hindtrochanter with sparse suberect simple setae; hindfemur and hindtibia with sparse decumbent and suberect simple and cuneate setae. COLORATION . Body yellowish brown; antenna yellowish brown; legs yellowish brown; flanges yellowish brown; ribbon-like setae whitish yellow. Female Unknown. Fig. 23. Loboscelidia vang sp. nov. , holotype, ♂ (VNMN). A . Lateral habitus. B . Head , frontal view. C . Head , dorsal view. D . Head , lateral view. E . Forewing. F . Pronotum, dorsal view. G . Mesosoma, dorsal view. Scale bars: A, E–G = 0.5 mm; B–D = 0.2 mm. Distribution Vietnam (Northern Vietnam ) ( Fig. 29 ). Remarks Loboscelidia vang sp. nov. resembles L. collaris Fouts, 1922 in having the following characteristics: yellowish brown body color; basal part of cervical expansion strongly constricted in dorsal view; and carinated dorso-lateral surface of pronotum. However, it can be distinguished by the following characteristics: rectangular frontal projection (triangular in L. collaris ); scape more than 3.5 times as long as wide (less than 3.0 times as long as wide in L. collaris ); F1 and F2 less than twice as long as wide (more than twice as long as wide in L. collaris ); temple longer than MOD (shorter than MOD in L. collaris ); and straight M vein (curved in L. collaris ).