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 montanus sp. nov. (SJN: Miyama-ko-maru-himebachi) ( Figs. 23A–E , 39C , 40P ) Type series . Holotype : JAPAN , KPM-NK 84937 , F, Nagano Pref. , Outaki Vil., Mt. Ontake-san , 13–25. VI. 2015 , S. Shimizu leg. (MsT). Description. Female ( n = 1). Body length 8.2 mm , matt and covered with silver setae. Head 0.6 × as long as wide in dorsal view. Clypeus 2.4 × as broad as high, sparsely punctate and polished, convex in lateral view, lower margin with a median concavity ( Fig. 40P ). Face 2.0 × as broad as high, slightly convex medially in lateral view. Dorsal profile of gena as Fig. 39C . Occipital carina complete. Length of malar space 0.4 × as long as basal width of mandible. Base of mandible flat. POL 0.75 × as long as OD. OOL 1.2 × as long as OD. Antenna with 31 flagellomeres. FL I 5.7 × as long as maximum depth, 1.55 × as long as FL II. 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. 23C ). Propodeum with all carinae except for anterior transverse carina ( Fig. 23D ). Lateromedian longitudinal carina obtuse anteriorly. Fore wing length 7.5 mm . Areolet absent. Fore wing vein 1cu-a postfurcal to vein M&RS. Nervellus slightly inclivous, intercepted posterior the middle. Tarsal claws simple. Hind femur 5.4 × as long as maximum depth in lateral view. Hind tarsus slender. Ratio of length of hind first to fifth tarsomeres 4.2: 2.0: 1.5: 0.9: 1.0. Metasoma. T I 2.3 × as long as maximum width, with latero-median longitudinal carina, its posterior end situated near the spiracle. T II 1.05 × as long as maximum width. Ovipositor sheath 0.125 × as long as hind tibia. Colouration ( Figs. 23A–E ). Body (excluding wings and legs) black. Face except for median oval marking, clypeus, malar space, mandible except for teeth, palpi, ventral spot of scape, posterior part of propleuron, postero-dorsal and postero-ventral corners of pronotum, a pair of large triangle markings of antero-lateral part of mesoscutum, tegula, subtegular ridge, mesosternum, posterior margins of T II to T VII, lateral sides of T IV to T VII, and metasomal sternites except for some small sclerites yellow to whitish yellow. Ovipositor sheath pale yellow. Wings hyaline. Veins and pterostigma blackish brown except for yellow wing base. Fore and mid coxae, trochanters, and trochantelli yellow. Fore and mid femora, tibiae, tibial spurs, and tarsi reddish brown to yellowish brown. Hind leg blackish brown. Hind coxa largely tinged with reddish brown. Hind trochantellus and tibial spurs whitish yellow. Fig. 23. Hyperbatus montanus sp. nov . (KPM-NK 84937, holotype, female) ― A: lateral habitus; B: head, frontal view; C: mesopleuron; D: propodeum, dorso-lateral view; E: ovipositor and ovipositor sheath. Male. Unknown. Distribution. Japan (Honshu). Bionomics. Unknown. Etymology . The specific name is from Latin “ montanus ” (mountainous). This species is found in mountainous areas. Remarks. This species resembles H. orbitalis Thomson, 1895 in the body colouration but can be distinguished by the T I 2.3 × as long as the maximum width (shorter than 2.0 × in H. orbitalis ) and the face with a median black oval mark (entirely yellow in H. orbitalis ).