A new species of genus Rhinotorus Foerster (Ichneumonidae, Ctenopelmatinae) parasitizing Pristiphora erichsonii (Hymenoptera, Tenthredinidae) and a key to Eastern Palaearctic species Author Li, Tao General Station of Forest and Grassland Pest Management, National Forestry and Grassland Administration, 58 Huanghe North Street, Shenyang 110034, China Author Sun, Shu-Ping General Station of Forest and Grassland Pest Management, National Forestry and Grassland Administration, 58 Huanghe North Street, Shenyang 110034, China Author Sheng, Mao-Ling https://orcid.org/0000-0003-0141-4697 General Station of Forest and Grassland Pest Management, National Forestry and Grassland Administration, 58 Huanghe North Street, Shenyang 110034, China shengmaoling@163.com text Journal of Hymenoptera Research 2020 2020-06-29 77 203 211 http://dx.doi.org/10.3897/jhr.77.53323 journal article http://dx.doi.org/10.3897/jhr.77.53323 1314-2607-77-203 2A131A72D5A2436CBFEC764ED43807CB 13DF30E66E41550494AB4879D5EFB54C 3932611 Rhinotorus nigrus Sheng, Li & Sun sp. nov. Figures 1-9 Etymology. The specific name is derived from the entirely black mesosoma and metasoma. Material examined. Holotype , female, reared from cocoon of Pristiphora erichsonii (Hartig) in Mt. Maoer , Yanji , Jilin Province , China by Tao Li on 24 May 2009 . Paratypes : 3 females , same data as holotype except 25 May-5 June 2009 . Diagnosis. Postocellar line as long as ocular-ocellar line. Area petiolaris of propodeum high (Fig. 7 ) with strong median longitudinal carina and irregular oblique longitudinal wrinkles. First and second tergites (Fig. 8 ) with distinct subposterior transverse depressions. First tergite approximately 0.8 x as long as posterior width. Head except clypeus, mesosoma, metasoma (Fig. 8 ), and hind leg (Fig. 1 ) black, except that basal 0.3 of hind tibia brownish and its spurs white. Figures 1-9. Rhinotorus nigrus Sheng, Li & Sun, sp. nov. Holotype, female 1 habitus and host's cocoon, lateral view 2 head, anterior view 3 head, lateral view 4 head, dorsal view 5 head, dorsoanterior view 6 mesosoma, lateral view 7 propodeum 8 metasoma, dorsal view 9 apical portion of metasoma, lateral view. Description. Body length 6.0-7.0 mm. Fore wing length 6.0-6.5 mm. Head . Inner orbits parallel. Face (Fig. 2 ) approximately 1.9 x as wide as long, slightly evenly convex, lateral portion shagreened, upper-median portion with distinct punctures; lower-median portion with indistinct punctures; upper margin with median small tubercle. Clypeus approximately 2.4 x as wide as long, smooth, shiny, with sparse shallow indistinct punctures, apical median portion convex; median section of apical margin distinctly depressed. Basal portion of mandible with dense indistinct punctures; upper tooth sharper and slightly longer than lower tooth. Malar area and vertex (Fig. 4 ) shagreened. Malar space approximately 0.5 x as long as basal width of mandible. Postocellar line approximately same length as ocular-ocellar line. Gena (Fig. 3 ) with fine punctures. Frons (Fig. 5 ) slightly convex medially, with dense fine punctures. Antenna with 31 flagellomeres; ratio of length from first to fifth flagellomeres approximately: 6.5:4.0:3.5:3.5:3.0. Occipital carina reaching hypostomal carina slightly above base of mandible. Mesosoma . Along anterior margin of pronotum (Fig. 6 ) with dense fine punctures; lateral concavity with weak oblique transverse wrinkles; upper-posterior portion with dense fine punctures. Mesoscutum, scutellum and postscutellm with fine punctures. Notauli reaching beyond middle. Scutoscutellar groove almost shiny. Mesopleuron (Fig. 6 ) slightly shagreened, upper-median portion with fine transverse wrinkles; speculum shiny, smooth. Upper end of epicnemial carina approximately reaching to 0.6 distance to subtegular ridge. Metapleuron evenly convex, with dense punctures; lower posterior portion with oblique wrinkles. Ratio of length of hind tarsomeres from first to fifth approximately: 10.0:5.0:3.5:2.0:2.5. Wings hyaline. Fore wing with vein 1cu-a slightly distal to M&RS. Postnervulus intercepted at lower 0.4. Hind wing vein 1-cu approximately 1.5 x as long as cu-a. Propodeum (Fig. 7 ) with complete strong median longitudinal and posterior transverse carinae; median longitudinal carinae almost parallel; between median longitudinal carinae and area petiolaris shiny, remain areae with dense distinct punctures; area petiolaris with strong median longitudinal carina and irregular oblique longitudinal wrinkles. Propodeal spiracle small, circular, located at basal 0.25. Metasoma . First three tergites (Fig. 8 ) with dense punctures. Subposterior portions of first and second tergites with weak transverse depressions. First tergite approximately 0.8 x as long as posterior width, with irregular short wrinkles; dorsal median carina reaching to 0.6 length of first tergite; dorsolateral and ventrolateral carinae complete; postpetiole strongly convex; spiracle small, circular, convex, located approximately at anterior 0.4 of first tergite. Second and third tergites (Fig. 8 ) approximately 0.5 x as long as posterior width. Fourth and subsequent tergites with relatively sparse fine punctures. Ovipositor sheath (Fig. 9 ) approximately 2.3 x as long as its maximum width, from middle evenly narrowed posteriorly. Colouration (Fig. 1 ). Black, except for following: clypeus, maxillary palpi, labial palpi, malar area, upper-posterior corners of pronotum, tegulae yellowish brown; mandible except base and teeth, fore and middle femora, tibiae and tarsi, apexes and bases of hind femora red brown; ventro-basal portions of hind tibiae brownish yellow; antennae, pterostigma and veins brownish black. Second and third metasomal sternites black brown. Male. Unknown. Distribution. China (Jilin). Host. Pristiphora erichsonii (Hartig).