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 do sp. nov. urn:lsid:zoobank.org:act: 40BF901C-8D8D-4051-B7F6-1669ABD7E85A Fig. 11 , 25G Etymology The specific name is derived from the Vietnamese word, ‘ do ’ for ‘red’, referring to the reddish body color. Type material Holotype VIETNAM • ♂ ; Bac Kan Province , Ba Be NP ; 22°24′43.34″ N , 105°36′54.76″ E ; 4 Jul. 2014 ; K. Tsujii leg.; VNMN . Paratypes VIETNAM • 1 ♂ ; same collection data as for holotype; VNMN • 1 ♂ ; Bac Giang Province , Tay Yen Tu NR ; 21°10′52.33″ N , 106°43′24.3″ E ; 7 Jul. 2014 ; T. Mita leg.; VNMN . Description Male ( Fig. 11A ) MEASUREMENTS . Body length 3.3–3.9 mm ; forewing length 3.3–3.7 mm . HEAD . Head ( Fig. 11B–D ) 1.9–2.3 times as long as high, 1.3 times as long as wide; inner ocular length 0.58–0.59 times as long as head width; frontal projection rectangular in frontal view ( Fig. 11B ); apical margin of frontal projection depressed ( Fig. 11C ); frons polished, with low ridge extending from vertex along inner orbit of eye ( Fig. 11C ); frons with indistinct carinae towards posterior ocelli ( Fig. 11C ); spraclypeal area without transverse carinae ( Fig. 11B ); temple 0.39–0.50 times as long as MOD ( Fig. 11C ); POL 0.85–1.1 times as long as MOD; OOL as long as MOD; LOL 0.17 times as long as MOD; behind ocelli without transverse depression ( Fig. 11C ); cervical expansion convex in lateral view ( Fig. 11D ); basal part of cervical expansion constricted weakly in dorsal view ( Fig. 11C ); scape 2.2–2.7 times as long as wide; scape with one longitudinal groove extending apical margin; scape with transparent flange, 0.85 times as long as tubular part of scape, 0.25 times wider than tubular part of scape; F1 1.8–2.0 times as long as wide; F2 1.7–2.1 times as long as wide; F11 3.4–3.9 times as long as wide; relative length of F1–F11: 1.0: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.2: 1.2: 1.6. MESOSOMA . Pronotum 0.82 times as long as posterior width of pronotum ( Fig. 11F ); posterior width of pronotum 1.4 times as wide as anterior width and 1.1 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 11A ); notauli of scutum slightly curved, reaching posterior margin ( Fig. 11G ); scutellum polished and inpunctured, with lateral carina ( Fig. 11G ); scrobal sulcus present, deeply depressed ( Fig. 11A ); metanotum with medial ridge, 0.44–0.47 times as long as scutellum ( Fig. 11G ); propodeal angle weakly developed; propodeum with transverse carina above foramen and not connected upper area. WINGS . Forewing ( Fig. 11E ) with M curved; cu-a 0.29–0.40 times as long as R; A extending half of Cu+M; R1 0.60–0.71 times as long as R; Rs 2.7–3.3 times as long as R. LEGS . Tibiae carinate; flange on forefemur 0.71–0.77 times longer, 1.0–1.3 times wider than tubular part of forefemur; flange on foretibia 0.63–0.75 times longer, 1.3–2.0 times wider than tubular part of foretibia; flange on midfemur 0.72–0.76 times longer, 1.0–1.5 wider than tubular part of midfemur; flange on midtibia 0.74–0.76 times longer, 0.89–1.0 times wider than tubular part of midtibia; hindcoxa 2.0 times as long as hind trochanter; postero-lateral margin of hind coxa with longitudinal carinae; basal part of hindfemur strongly producing; hindfemur basally stout, apparently wider than distal part; ventral margin of hindfemur flat; outer surface of hindtibia smooth; flange on hindfemur 0.60–0.85 times longer, 0.90–1.0 times wider than tubular part of hindfemur; flange on hindtibia 0.83–0.89 times longer, 1.8–2.0 times wider than tubular part of hindtibia; median tooth of tarsal claw far beyond half of tarsal claw (25G). Fig. 11. Loboscelidia do 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. PILOSITY . Spraclypeal area with sparse erect simple setae ( Fig. 11B ); temple with sparse suberect simple setae ( Fig. 11C ); lower gena with sparse decumbent simple setae ( Fig. 11D ); frons with sparse decumbent simple setae ( Fig. 11C ); around spiracle of propodeum with sparse decumbent simple setae; forefemur and foretibia with dense decumbent simple setae; dorsal surface of forefemur, foretibia, midtibia and hindtibia with sparse suberect simple setae. COLORATION . Body reddish brown; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae whitish yellow. Female Unknown. Distribution Vietnam (Northern Vietnam ) ( Fig. 27 ). Remarks Loboscelidia do sp. nov. resembles L. cuneata sp. nov. , L. parallela sp. nov. and L. pecki Kimsey, 2012 in the following characteristics: reddish brown body color; rectangular frontal projection; F1 and F2 nearly twice as long as wide; transverse carina absent behind ocelli; flat ventral margin of the hindfemur. However, L. do sp. nov. can be distinguished by the following characteristics: frons with setae ( L. cuneata sp. nov. without setae); scape less than 3.0 times as long as wide (more than 3.0 times as long as wide in other species); femora with simple setae ( L. cuneata sp. nov. with cuneate setae); basal of cervical expansion weakly constricted (other two species parallel); R1 vein less than 0.80 times as long as R (as long as R in L. pecki ), and cu-a vein longer than 0.29 times as long as R (absent or slightly present in L. pecki ).