Coelichneumon nipponicus Uchida, 1927

Riedel, Matthias & Watanabe, Kyohei, 2021, The genus Coelichneumon Thomson in Japan (Hymenoptera, Ichneumonidae, Ichneumoninae), Zootaxa 4948 (4), pp. 501-545 : 527-529

Coelichneumon nipponicus Uchida, 1927

Coelichneumon nipponicus Uchida, 1927: 196 , ♀.

Coelichneumon kodakasaensis Uchida, 1935: 15 , ♀, synonymized by Townes et al., 1965: 527.

Holotype of C. nipponicus : ♀ “ Japan Uchida; [red] Type; Coelichn. nipponicus nov. det. Uchida ” (Sapporo), type studied.

Holotype of C kodakasaensis : ♀ “ Mt. Kooda Prov. Tosa 12-VII-1933 Y. Sugihara; [red] Type Matsumura; Coelichn. kodakasiensis nov. det. Uchida ” (Sapporo), type studied.

Non-type material: JAPAN: 1 ♀, Hokkaido, Horokanai Town, Moshiri, Urvu , 14.vii.2012, K. Watanabe leg. ; 1 ♀, Hokkaido, Shikaribetsuko , 14.ix.1959 , R. & F. Ishikawa leg .; 1 ♀, Hokkaido, Shimukattupu, Shimo-Tomamu , 18.vi.2006, K. Watanabe leg. ; 1 ♀, Hokkaido, Obihiro City, Takusei Town, Tottabetsu-rindo , 390 m, 24.vi.2017, K. Watanabe leg. ; 1 ♂, Hokkaido, Eniwa City, Banjiri , 42.50°N 141.26°E, ca. 230 m alt., 20.vi.2017, K. Watanabe leg. ; 1 ♀, Tochigi Pref., Kuriyama Vil., Kinunuma , 19.vii.–1.viii.2004, H. Makihara leg. ; 1 ♂, Osaka Pref., Chihay- aakasaka Vil., Mt. Kongosan , 1056 m alt., 34.4140°N 135.6776°E, 7–15.vii.2012, S. Fujie leg. ; 1 ♀, Nagano Pref., Shiojiri City, Narai Gonbeetouge-road , 6.viii.2010, K. Watanabe leg. ; 1 ♀, Toyama Pref., Toyama City, Arimine, Jurodani , 1120 m alt., 14–21.vii.2009 , M. Watanabe et al. leg., MT ; 1 ♂, Kanagawa Pref., Atsugi City, Funako , 22.iv.–16.v.2016, Y. Kato & S. Koizumi leg. , MT; 1 ♀, Yamanashi Pref., Hokuto City, Masutoni, Biwakubo-zawa , 35.5118°N 138.3454°E, 1360–1560 m alt., 7.viii.2007, K. Watanabe leg. ; 1 ♂, Kagoshima Pref., Yakushima Is., 1200 m alt., 7–28.vi.2007 , T. Yamauchi et al. leg., MT ; 2 ♂♂, Yamagata Pref., Mamurogawa Town , 38.8478°N 140.8455°E, 14.vii.2012, Y. Matsubara & K. Fukuda leg. , MT ( Sapporo ) .

Description: ♀: Body length 17‒18 mm. Flagellum lanceolate, with 41‒42 flagellomeres; 1 st flagellomere (without anellus) 2.0‒2.3× longer than wide, 2 nd flagellomere 2.0‒2.1× longer than wide, combined length 0.48‒ 0.62× eye length; 12 th to 13 th flagellomeres square; flagellomeres beyond middle attenuated, widest flagellomeres 1.6‒1.8× wider than long. Temple moderately and roundly narrowed behind eye. OED 1.2‒1.3× ocellar diameter. Frons and face with superficial and dense punctures and fine granulation. Clypeus smooth or with fine granulation, with scattered or rather dense punctures, shining. MI 0.60‒0.65. Gena 1.0‒1.25× as wide as eye, with scattered or rather dense and sometimes superficial punctures ventrally. Genal carina reaching hypostomal carina far from the mandibular base.

Mesosoma with light brownish hairs dorsally, with whitish hairs ventrally. Pronotum with strong epomiae, with very superficial punctures dorsally and longitudinal striation ventrally. Notaulus distinct at frontal 1/3 of mesoscutum. Mesoscutum densely but superficially punctate, finely granulate, ± opaque; mesopleuron and metapleuron with dense punctures, speculum large, smooth and shining; juxtacoxal carina strong. Scutellum slightly convex, about as long as wide or slightly longer than wide, without lateral carinae, with scattered punctures. Propodeum rounded. Area superomedia heart-shaped, about as long as wide, sometimes confluent with area basalis; anterior transversal carina clearly behind its middle. Area externa finely granulate and with superficial punctures; area petiolaris with transverse rugae. Mid and hind coxae densely punctate, hind coxa with scopa (1/4‒1/3 of coxal length). Hind femur 3.6‒3.9× longer than wide, densely punctate, with scattered punctures in ventral 1/3. 3 rd mid tarsomere 1.3‒1.7× longer than wide. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 1‒3× their width; vein 2m-cu distad its middle. Vein 1cu-a postfurcal by 1‒2× its width.

Metasoma strongly oxypygous. Lateral field of postpetiolus almost smooth or finely rugose, 0.4‒0.6× as wide as median field, the latter with longitudineal striae and dense punctures. Thyridium strongly impressed, oblique, 1.1‒1.3× wider than the interval; interval c.0.5× as wide as median field of postpetiolus. 2 nd tergite length 0.95‒1.05× width; 2 nd and 3 rd tergites coarsely and densely punctate, ± strongly rugose-striate medially. 7 th tergite 1.3‒2.0× wider than long. Seen from dorsal, ovipositor sheath 0.5‒0.8× as long as 7 th tergite.

Color: Black. Palps brownish. Stripes on flagellomeres 8/9‒12, narrow frontal orbit and spot on vertex yel- lowish. Mesosoma and metasoma completely black (in holotype of C. kodakasaensis metasoma with weak bluish shine). Legs black; fore femur with yellowish apical spot; fore tibia and tarsus with yellowish stripes frontally, sometimes hind tibia with diffuse reddish subbasal ring. Wings slightly brownish infuscate, pterostigma reddishbrown to brown.

♂: Body length 17.5‒18.5 mm. Flagellum with 39‒42 flagellomeres. Tyloids on flagellomeres 5/6‒16/18, red- dish or brownish, long-oval, centrally, 0.5× as long as the flagellomeres. Temple strongly but roundly narrowed behind eye. OED 0.9× ocellar diameter. Frons with scattered puncture, largely smooth. Face and clypeus punctate. MI 0.2.

Mesosoma with pale hairs. Notaulus slightly impressed. Mesoscutum, mesopleuron and metapleuron punctate and shining, juxtacoxal carina present. Scutellum slightly longer than wide, with fine punctures, with lateral carina in basal 0.2. Area superomedia heart-shaped, wider than long, with smoothened surface, anterior transversal carina present; area externa with some coarse punctures. Fore metatarsus with apical tooth. Hind femur 3.7‒3.9× longer than wide.

Lateral field of postpetiolus 0.6‒0.8× as wide as median field, the latter with fine aciculation. 2 nd tergite 1.1× longer than wide. Thyridium oblique, 0.9‒1.1× as wide as the interval. 2 nd to 4 th tergites with superficial punctures, finely granulate; 2 nd tergite with median aciculation, 3 rd tergite longitudinally rugose medially.

Color: Black. Flagellum reddish-brown ventro-apically. Palps, mandible except teeth, labrum, clypeus, face (sometimes except central blackish stripe), narrow frontal orbit, small vertical spot, scapus ventrally, spots on collare and hind edge or stripe on upper margins of pronotum, spot on subtegular ridge, frontal spots on fore and middle coxae, sometimes apico-ventrasl spot on hind coxa, fore and mid femora, tibiae and tarsi frontally, 4 th and 5 th hind tarsomeres partly ivory. Pterostigma dark brown to black.

Distribution: Japan (Hokkaido, Honshu, Shikoku and Yakushima Is.) and Far East Russia ( Uchida 1926; Uchida 1935). Iwata (1960) recorded this species from Miyazaki Pref., Kyushu, while we found no voucher specimen.