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 barbata sp. nov. urn:lsid:zoobank.org:act: CF92A69F-EE81-4B29-9165-F6FA8EE078B9 Figs 3A , 5 , 25B Etymology Named after the Latin ‘ barbata ’, meaning ‘beard’, referring to the scale-like setae on the lower gena. Type material Holotype VIETNAM • ♂ ; Thua Thien Hue Province , Bach Ma NP , pheasant trail; 16.231° N , 107.852° E ; 4 Aug. 2016 ; T. Mita leg.; VNMN . Paratypes VIETNAM • 9 ♂♂ ; same collection data as for holotype; VNMN • 1 ♂ ; same collection data as for holotype but 15 Sep. 2022 ; VNMN • 1 ♂ ; same locality data as for holotype; 16 Sep. 2022 ; Y. Hisasue leg.; VNMN • 4 ♂♂ ; Thua Thien Hue Province , Bach Ma NP , Stone Sign ; 16.194° N , 107.865° E ; 2 Aug. 2016 ; T. Mita leg.; VNMN • 1 ♂ ; Vinh Phuc Province , Tam Dao District , Tam Dao NP ; 21.453° N , 105.648° E ; 4 Aug. 2016 ; K. Tsujii leg.; VNMN . Description Male ( Fig. 5A ) MEASUREMENTS . Body length 3.8–5.2 mm ; forewing length 3.4–5.0 mm. HEAD . Head ( Fig. 5B–D ) 1.8–1.9 times as long as high, 1.2–1.4 times as long as wide; inner ocular length 0.58 times as long as head width; frontal projection rectangular in frontal view ( Fig. 5B ); apical margin of frontal projection depressed ( Fig. 5C ); frons rugose, with low ridge extending from vertex along inner orbit of eye ( Fig. 5C ); frons with indistinct wrinkles towards median ocellus ( Fig. 5C ); frons with frontal line ( Fig. 5C ); spraclypeal area with transverse carinae ( Fig. 5B ); ftemple 0.50–0.71 times as long as MOD ( Fig. 5C ); POL 1.3–1.4 times as long as MOD; OOL 1.4–1.5 times as long as MOD; LOL 0.42–0.43 times as long as MOD; behind ocelli without transverse depression ( Fig. 5C ); cervical expansion convex in lateral view ( Fig. 5D ); cervical expansion with longitudinal furrow ( Fig. 5C ); basal part of cervical expansion constricted weakly in dorsal view ( Fig. 5C ); scape 2.9–3.2 times as long as wide; scape with longitudinal grooves; scape with transparent flange; F1 2.0–2.3 times as long as wide; F2 2.2–2.3 times as long as wide; F11 3.8 times as long as wide; relative length of F1–F11: 1.2: 1.2: 1.1: 1.1: 1.1: 1.0: 1.1: 1.0: 1.1: 1.1: 1.5. MESOSOMA . Pronotum 0.79–0.81 times as long as posterior width of pronotum ( Fig. 5E ); posterior width of pronotum 1.5–1.6 times as wide as anterior width and 1.2 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 5A ); notauli of scutum slightly curved, reaching posterior margin ( Fig. 5F ); scutellum punctured ( Fig. 5F ); scrobal sulcus present, weakly depressed ( Fig. 5F ); metanotum punctured, without ridge, 0.37–0.42 times as long as scutellum ( Fig. 5F ); propodeal angle strongly developed; upper area of propodeum without transverse carina; propodeum without transverse carina above foramen. WINGS . Forewing ( Fig. 5G ) with M curved; cu-a 0.88–0.92 times as long as R; A longer than Cu+M; R1 0.43–0.54 times as long as R; Rs 2.4–2.8 times as long as R. LEGS . Tibiae carinate; flange on forefemur 0.59–0.63 times longer, 0.90–1.1 times wider than tubular part of forefemur; flange on foretibia 0.57–0.58 times longer, 0.86–1.0 times wider than tubular part of foretibia; flange on midfemur 0.50–0.71 times longer, 0.70–0.80 times wider than tubular part of midfemur; flange on midtibia 0.62–0.68 times longer, 0.71–1.0 times wider than tubular part of midtibia; dorsolateral margin of hindcoxa with longitudinal carinae; basal part of hindfemur producing; hindfemur basally stout, slightly wider than distal part; ventral margin of hindfemur flat; outer surface of hindfemur carinate; flange on hindfemur 0.58–0.74 times longer, 0.91–0.92 times wider than tubular part of hindfemur; flange on hindtibia 0.75–0.83 times longer, 0.96–1.1 times wider than tubular part of hindtibia. PILOSITY . Spraclypeal area with sparse decumbent and suberect cuneate setae ( Fig. 5B ); temple with sparse decumbent cuneate setae ( Fig. 5C ); lower gena with sparse decumbent scale-like setae ( Fig. 5D ); hypostoma with sparse decumbent scale-like setae; scape with sparse decumbent simple and cuneate setae; pedicel with sparse decumbent simple and cuneate setae; scutellum without setae ( Fig. 5F ); forecoxa with sparse decumbent cuneate setae; foretrochanter with sparse decumbent cuneate setae; forefemur with sparse decumbent cuneate setae; foretibia with sparse decumbent cuneate setae; midcoxa, midtrochanter, midfemur and midtibia with sparse decumbent cuneate setae; hindcoxa, hindtrochanter, hindfemur and hindtibia with sparse decumbent cuneate setae. COLORATION . Body reddish brown to blackish brown; antenna blackish brown; legs blakish brown; flanges yellowish brown; ribbon-like setae whitish yellow. Female Unknown. Distribution Vietnam (Northern Vietnam , Central Vietnam ) ( Fig. 26 ). Fig. 5. Loboscelidia barbata sp. nov. , holotype, ♂ (VNMN). A . Lateral habitus. B . Head , frontal view. C . Head , dorsal view. D . Head , lateral view. E . Pronotum, dorsal view. F . Mesosoma, dorsal view. G . Forewing. Scale bars: A = 1 mm; B–G = 0.5 mm. Remarks Loboscelidia barbata sp. nov. resembles L. convexa sp. nov. and L. sisik in having the following characteristics: reddish brown ( L. convexa sp. nov. ) to dark brown ( L. sisik ) body color, scale-like setae on the lower gena, and cervical expansion with longitudinal furrow ( L. convexa sp. nov. ). However, L. barbata sp. nov. can be distinguished by the following characteristics: rectangular frontal projection (triangular in L. sisik ); strongly convex cervical expansion (weakly convex in L. sisik ); cervical expansion with longitudinal furrow ( L. sisik without longitudinal furrow); scape 2.9 times as long as wide (twice as long as wide in L. sisik ); pronotum 0.80 times as long as posterior width (0.70 times as long as the posterior width in L. convexa sp. nov. ); metanotum that 0.40 times as long as scutellum (more than 0.50 times as long as the scutellum in L. convexa sp. nov. ); midtibial flange present ( L. sisik absent); and longer A vein longer than Cu + M (as long as Cu + M in L. sisik ).