Four genera of the subfamily Opiinae Blanchard (Hymenoptera, Braconidae) new for Japan, with the description of two new species Author Han, Yunjong 0000-0003-2757-7785 Animal Systematics Laboratory, Department of Biological Science, Kunsan National University, Gunsan, 54150, Republic of Korea Author van Achterberg, Cornelis 0000-0002-6495-4853 Naturalis Biodiversity Center, P. O. 9517, 2300 RA Leiden, Netherlands Author Kim, Hyojoong 0000-0002-1706-2991 Animal Systematics Laboratory, Department of Biological Science, Kunsan National University, Gunsan, 54150, Republic of Korea text ZooKeys 2024 2024-07-08 1206 207 229 journal article 299619 10.3897/zookeys.1206.125662 96bcb877-5634-440f-b233-e8d0996d36d5 13AF475B-5FDF-42C1-876B-EA8A6841B0B7 Neopius citrinus Sheng & Chen, 2019 Figs 26 , 27–36 Neopius citrinus Sheng & Chen, 2019: 592–595 . Material. 1 ♀ ( OMNH ), “ Japan (Honshu): Nakaikemi Wetlands, Kashimagari, Tsuruga, Fukui , 35.6594 ° N , 136.0884 ° E , 24. v. – 17. vi. 2016 , MT [= Malaise trap], Asato Noishiki leg., OMNH ”. Diagnosis. Face yellow (Fig. 31 ); notauli nearly complete, gradually reduced posteriorly; occiput comparatively straight in dorsal view (Fig. 32 ); head largely granulate; scutellar sulcus comparatively robust (Fig. 29 ); propodeum reticulate-rugose with a medio-longitudinal carina; second and third tergites granulate. Re-description. Female ; length of body 2.8 mm , of fore wing 3.0 mm. Head . Antenna with 29 segments (Fig. 25 ; broken and lost); third segment 2.3 × longer than its width, 1.2 × longer than fourth segment; eye 1.5 × longer than temple in dorsal view (Fig. 23 ); vertex granulate and sparsely setose; frons and occiput shiny and granulate; face densely punctate and setose (Fig. 21 ); clypeus 2.5 × wider than its maximum height; clypeus densely setose, its ventral margin slightly protruding downward; hypoclypeal depression distinct; maxillary palpi nearly 0.7 × as long as height of head; malar sulcus absent; occipital carina completely present and crenulate, (Figs 29 , 32 ); mandible gradually widened basally, moderately setose and hardly twisted in lateral view without acute basal lamella (Fig. 33 ). Figure 26. Neopius citrinus Sheng & Chen , ♀, Japan, habitus, lateral. Figures 27–36. Neopius citrinus Sheng & Chen , ♀, Japan. 27 fore wing 28 mesosoma lateral 29 mesosoma dorsal 30 metasoma dorsal 31 head anterior 32 head dorsal 33 head lateral 34 ovipositor lateral 35 antenna 36 hind femur. Mesosoma . Mesosoma 1.3 × longer than its height (Fig. 29 ); pronope absent but transverse crenulated groove and sparsely setose along lateral margin (Fig. 30 ); pronotal side granulate with ventral crenulated groove; propleuron granulate (Fig. 29 ); mesopleuron largely coriaceous, but precoxal sulcus crenulate, wide, oblique and reaching anterior area (converging epicnemial area and dorsal crenulate carina); epicnemial area crenulate; mesopleural sulcus crenulate; mesosternum densely setose; anterior groove of metapleuron crenulate, remaining area reticulate-rugose, shiny and densely setose; notauli distinctly crenulate antero-medially, but gradually obsolescent posteriorly (Fig. 29 ); medio-posterior depression of mesoscutum large, elliptical and deep; mesoscutum coriaceous with few setae along the notaulic course; scutellar sulcus medium-sized, moderately crenulate and gradually narrowed laterally; scutellum granulate and rather flat in lateral view; propodeum entirely reticulate-rugose and densely setose with a short medio-longitudinal carina. Wings . Fore wing (Fig. 27 ): Pterostigma triangular and gradually narrowed apically; vein r sublinear with vein 3 - SR; vein 1 - M nearly straight; vein 1 - SR + M straight; vein 2 - SR slightly sinuate and oblique; vein 3 - SR 1.5 × longer than vein 2 - SR; r: 3 - SR: SR 1 = 5: 18: 37; vein SR 1 straight; vein m-cu distinctly postfurcal; first subdiscal cell open; vein CU 1 b short and incomplete. Hind wing (Fig. 28 ): vein m-cu absent; vein 2 - M absent. Legs . Length of hind femur 4.4 × its maximum width (Fig. 36 ). Metasoma . First metasomal tergite 0.9 × as long as its apical width, its surface striate-rugose and slightly convex medio-basally in lateral view (Figs 26 , 30 ); dorsope absent; second metasomal suture obsolescent (Fig. 30 ); second tergite shiny and granulate, with shallow pair of depressions medio-basally; third tergite granulate medially and following tergites shiny and smooth, with band of setae posteriorly; setose part of ovipositor sheath 0.5 × longer than first tergite (Fig. 34 ). Colour . Body generally black (Fig. 26 ); head yellowish-brown but frons and vertex black medially (Fig. 32 ); legs and ovipositor, light brown; second and half of basal third tergites, brown; pterostigma and vein of wings, light brown; wings, subhyaline. Distribution. Japan (Honshu; new record), China ( Heilongjiang , Jilin and Liaoning ). Biology. Unknown.