Taxonomic Study of Japanese Ctenopelmatinae (Hymenoptera, Ichneumonidae), with Descriptions of 22 New Species Author Watanabe, Kyohei text Bulletin of the Kanagawa Prefectural Museum (Natural Science) 2024 2024-03-22 53 39 102 journal article 10.5281/zenodo.13237363 2189-6720 13237363 D4FC7074-ADC6-4310-B60E-12B7ECBD6E25 Hyperbatus borealis sp. nov. (SJN: Kita-ko-maru-himebachi) ( Figs. 22A–E , 39B , 40O ) Type series . Holotype : JAPAN , KPM-NK 84936 , F, Hokkaido , Hidaka Town , Uenzaru-gawa , 1–28. VIII. 2007 , A. Ueda leg. (MsT). Description. Female ( n = 1). Body length 8.35 mm , matt and covered with silver setae. Head 0.6 × as long as wide in dorsal view. Clypeus 2.5 × as broad as high, sparsely punctate and polished, convex in lateral view, lower margin with a median concavity ( Fig. 40O ). Face 1.95 × as broad as high, slightly convex medially in lateral view. Dorsal profile of gena as Fig. 39B . Occipital carina complete. Length of malar space 0.4 × as long as basal width of mandible. Base of mandible flat. POL 1.0 × as long as OD. OOL 1.5 × as long as OD. Antenna with 39 flagellomeres. FL I 6.65 × as long as maximum depth, 1.65 × as long as FL II. Fig. 22. Hyperbatus borealis sp. nov . (KPM-NK 84936, holotype, female) ― A: lateral habitus; B: head, frontal view; C: mesopleuron; D: propodeum, dorso-lateral view; E: ovipositor and ovipositor sheath. Mesosoma polished. Epomia absent. Mesoscutum with weak notaulus. Epicnemial carina present laterally and ventrally, its dorsal end situated near anterior margin of mesopleuron. Speculum with large smooth area ( Fig. 22C ). Propodeum with pleural carina, partly indistinct posterior transverse carina, lateral longitudinal carina except anterior part, largely indistinct lateromedian longitudinal carina ( Fig. 22D ). Fore wing length 7.6 mm . Areolet absent. Fore wing vein 1cu-a postfurcal to vein M&RS. Nervellus inclivous, intercepted posterior the middle. Tarsal claws simple. Hind femur 5.9 × as long as maximum depth in lateral view. Hind tarsus slender. Ratio of length of hind first to fifth tarsomeres 4.0: 2.0: 1.5: 0.9: 1.0. Metasoma coriaceous. T I 1.9 × as long as maximum width, with latero-median longitudinal carina, its posterior end situated anterior the spiracle. T II 0.85 × as long as maximum width. Ovipositor sheath 0.175 × as long as hind tibia. Colouration ( Figs. 22A–E ). Body (excluding wings and legs) black. A pair of lateral areas of face, clypeus, malar space, mandible except for teeth, palpi, ventral spots of scape and pedicel, postero-dorsal corner of pronotum, a pair of large markings of antero-lateral part of mesoscutum, tegula, subtegular ridge, posterior margins of T II to T VII, lateral sides of T IV to T VII, and metasomal sternites except for some small sclerites whitish yellow. Wings hyaline. Veins and pterostigma brown to yellowish except for yellow wing base. Fore and mid coxae, trochanters, and trochantelli whitish yellow. Fore and mid femora, tibiae, tibial spurs, tarsi, and hind femur reddish brown. Hind coxa and trochanter black dorsally, reddish brown ventrally. Hind trochantellus whitish yellow. Hind tibia reddish brown, slightly darkened apically. Hind tibia and tarsus blackish brown except for subbasal part of tibia tinged with yellowish brown. Hind tibial spurs yellowish brown. Male. Unknown. Distribution. Japan ( Hokkaido ). Bionomics. Unknown. Etymology. The specific name is from Latin “ borealis ” (northern). This species collected the northern Japan , Hokkaido . Remarks. This species resembles H. segmentator in the face with the yellow area and the black ovipositor sheath, but can be distinguished by the antenna with 39 flagellomeres ( 28 in H. segmentator ), the T I 1.9 × as long as the maximum width ( 1.5 in H. segmentator ), and the hind coxa black (red to reddish brown in H. segmentator ).