Benyllus rufoniger, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1124-1125

Benyllus rufoniger nov.sp. ( figs 8-10 )

Holotype: ♀ " Nepal, P: Mahakali, D: Darchula , Bachtal S Thaisan 18.VI.2017, leg. Weigel, 2910 m mountain mixed forest, 3 rd tent place, N 29°51´12´´ E 80°40´17´´ " (Erfurt).

D e s c r i p t i o n: ♀: Body length 9.5 mm. Flagellum filiform, with 31 (right) or 32 (left) flagellomeres; 1 st flagellomere 2.4x longer than wide, 15 th flagellomere square, widest flagellomeres slightly wider than long; apical flagellomere blunt. Temple distinctly and roundly narrowed behind eye. Distance of lateral ocellus to eye 1.0x ocellar diameter. Vertex and frons granulate and with very superficial punctures, matte. Face with dense punctures, centrally with transverse rugae. Clypeus slightly convex, 2.4x wider than long, with scattered punctures, shining; apical margin sharp and slightly concave. Gena with scattered punctures ventrally, 0.9x as wide as eye. Malar space 1.0x as long as width of mandibular base. Mandible with two teeth, lower tooth slightly smaller than upper one. Genal carina reaching hypostomal carina far away from mandibular base, both carinae low.

Mesosoma with fine and short grey hairs. Notaulus distinctly impressed in frontal 0.5 of mesoscutum. Mesoscutum granulate and with fine dense punctures, matte. Mesopleuron densely punctate dorsally and with fine striation ventrally. Metapleuron finely striate. Juxtacoxal carina present. Scutellum slightly convex, slightly longer than wide, with rather dense punctures and lateral carina in 7/10 of scutellar length. Area basalis trapezoid, wider than long, without median tubercle. Area superomedia hexagonal, about as long as wide, rugose; costula reaching its middle. Area petiolaris moderately impressed, rugose, without lateral carina. Outer dentiparal edge with short and blunt, tooth-shaped apophysis. Hind coxa densely punctate and densely pilose, but without distinct scopa. Legs slender. Hind femur 5.1x longer than wide, with dense punctures. Hind tibia without external denticular spurs. Claws large, not pectinate, strongly bent apically (by 90°).

Areolet pentagonal, frontal distance of intercubiti 3-4x their width; 2 nd recurrent vein reaching areolet in the middle. Nervulus postfurcal (by 1x its width).

Metasoma oxypygous. Postpetiolus slightly widened apically, granulate, without dorsal carina, median field not separated. Gastrocoelus not impressed. Thyridium small and kidney-shaped, slightly oblique, 0.3x as wide as the interval. 2 nd tergite 1.05x longer than wide. 2 nd and 3 rd tergites finely granulate, matte, 2 nd tergite also with fine superficial punctures. Following tergites finely granulate, but shining. 2 nd to 5 th sternites with median folds. Ovipositor sheath stab-shaped, moderately extending behind metasomal apex (by length of 3 rd hind tarsomere).

Colour: Head and mesosoma mainly reddish-brown, metasoma black. Stripes on flagellomeres 8-15 and frontal orbit up to vertex (widened opposite to ocelli) ivory. Scape red, pedicle and flagellum (except ivory ring) black. Frons ventrally and occiput entirely blackish. Narrow upper margin of pronotum and spot on subtegular ridge yellowish. Spot on collare, propleuron ventrally, margins of mesopleuron, ventral margin of metapleuron, area beside postscutellum, frontal and apical margins of propodeum blackish. Fore and mid legs and hind coxa reddish. Trochanters and trochantelli ± blackish; hind femur blackish, with diffuse reddish stripe ventrally; hind tibia and tarsus blackish. Wings hyaline, pterostigma reddish.

♂ unknown.

Figures

Figs 8-10: Benyllus rufoniger nov.sp. ♀: (8) habitus from lateral, (9) propodeum, (10) basal tergites. Fig. 11: Bystra nigromaculata nov.sp. ♀: habitus from dorsal. Figs 12-14: Ctenichneumon caeruloventris nov.sp. ♀: (12) habitus from lateral, (13) head of ♀ from dorsal, (14) propodeum.