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 bachmaensis sp. nov. urn:lsid:zoobank.org:act: 45AE8FE5-9A36-4E8C-9E81-AD92B60E90D0 Figs 4 , 25A Etymology The species epithet is named after the type locality, “Bạch Mã”. Type material Holotype VIETNAM • ♂ ; Thua Thien Hue Province , Bach Ma NP , 19 km point; 16.192° N , 107.849° E ; 3–6 Aug. 2016 ; T. Mita and Y. Komeda leg.; YPT ; VNMN . Paratypes VIETNAM • 2 ♂♂ ; same collection data as for holotype; VNMN . Description Male ( Fig. 4A ) MEASUREMENTS . Body length 2.7 mm ; forewing length 2.7 mm . HEAD . Head ( Fig. 4B–D ) 1.5 times as long as high; 1.2 times as long as wide; inner ocular length 0.66 times as long as head width; frontal projection rectangular in frontal view ( Fig. 4B ); apical margin of frontal projection straight; lower part of frontal projection shorter than upper part ( Fig. 4D ); frons granulate, finely microstriate ( Fig. 4C ); frons with low ridge extending from median ocellus along inner orbit of eye ( Fig. 4C ); spraclypeal area with transverse carinae ( Fig. 4B ); temple 0.80 times as long as MOD ( Fig. 4C ); POL 0.8 times as long as MOD; OOL 1.2 times as long as MOD; LOL 0.2 times as long as MOD; behind ocelli without transverse depression ( Fig. 4C ); cervical expansion convex in lateral view ( Fig. 4D ); basal part of cervical expansion constricted weakly in dorsal view ( Fig. 4C ); scape 2.1 times as long as wide; scape with longitudinal grooves; F1 1.4 times as long as wide; F2 1.6 times as long as wide; F11 3.2 times as long as wide; relative length of F1–F11: 1.0: 1.1: 1.2: 1.2: 1.2: 1.2: 1.3: 1.3: 1.3: 1.3: 1.8. MESOSOMA . Pronotum 0.81 times as long as posterior width of pronotum ( Fig. 4F ); posterior width of pronotum 1.2 times as wide as anterior width and as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 4A ); notauli of scutum slightly convergent to posterior, not reaching posterior margin ( Fig. 4F ); median part of scutellum polished ( Fig. 4E ); posterior part of scutellum rugose; scrobal sulcus present, weakly depressed ( Fig. 4A ); metanotum with three ridges; metanotum 0.39 times as long as scutellum ( Fig. 4E ); propodeal angle weakly developed; propodeum without transverse carina above foramen. WINGS . Forewing with M curved ( Fig. 4G ); cu-a 0.37 times as long as R; A extending half of Cu+M; R1 0.67 times as long as R; Rs 2.8 times as long as R. LEGS . Tibiae smooth; flange on forefemur 0.61 times longer, 0.89 times wider than tubular part of forefemur; flange on foretibia 0.42 times longer, 0.50 times wider than tubular part of foretibia; flange on midfemur 0.76 times longer, 0.70 times wider than tubular part of midfemur; flange on midtibia 0.76 times longer, 0.67 times wider than tubular part of midtibia; 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 0.74 times longer, 1.2 times wider than tubular part of hindfemur; outer surface of hindtibia smooth; flange on hindtibia 0.79 times longer, 2.0 times wider than tubular part of hindtibia; hindtarsal claw with tooth reaching ⅓ of hindtarsal claw. Fig. 4. Loboscelidia bachmaensis sp. nov. , holotype, ♂ (VNMN). A . Lateral habitus. B . Head , frontal view. C . Head , dorsal view. D . Head , lateral view. E . Mesosoma, dorsal view. F . Pronotum, dorsal view. G . Forewing. Scale bars: A, G = 0.5 mm; B–F = 0.2 mm. PILOSITY . Lower gena with sparse decumbent simple and cuneate setae ( Fig. 4D ); scape with sparse decumbent simple and simple setae; pedicel with sparse decumbent cuneate setae; dorsal surface of pronotum with sparse decumbent cuneate setae ( Fig. 4F ); forefemur with sparse decumbent and suberect simple setae; hindtibia with sparse decumbent cuneate setae. COLORATION . Body reddish brown; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae white. Female Unknown. Distribution Vietnam (Central Vietnam ) ( Fig. 26 ). Remarks This species closely resembles L. vietnamensis sp. nov. in having the following characteristics: weakly convex cervical expansion, F11 3.0 times as long as wide, and a polished scutellum. However, L. bachmaensis sp. nov. can be distinguished by the following characteristics: frontal projection equal to shorter than upper part in lateral view (longer than above in L. vietnamensis sp. nov. ); temple 0.80 times as long as MOD (0.3–0.6 times longer than in L. vietnamensis sp. nov. ); POL shorter than MOD (longer than MOD in L. vietnamensis sp. nov. ); tooth of hindtarsal claw reaching ⅓ of hindtarsal claw (less than ¼ in L. vietnamensis sp. nov. ).