Diphyus nepalensis, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1130-1131

Diphyus nepalensis nov.sp. (fig. 19)

Holotype: ♀ " Nepal, Khumbu Khumdzung , 3900 m, 15.6.1962, leg. G. Ebert & H. Falkner " ( ZSM).

D e s c r i p t i o n: ♀: Body length 15 mm. Flagellum bristle-shaped, with 52 flagellomeres; 1 st flagellomere 2.4x longer than wide, widest flagellomeres 1.2x wider than long. Temple long, moderately and almost linearly narrowed behind eye, dorsally 1.0x as long as eye. Distance of lateral ocellus to eye 1.3x ocellar diameter. Vertex and frons coarsely rugose-punctate. Face coarsely punctate, partly rugose. Clypeus densely punctate, with sharp and straight apical margin. Gena 1.2x wider than eye, with coarse striated rugae, punctate ventrally. Malar space 1.2x longer than width of mandibular base. Mandible with two teeth, lower tooth smaller than upper one. Genal carina reaching hypostomal carina away from mandibular base; both carinae low.

Mesosoma covered with fine brownish hairs. Notaulus not impressed. Mesoscutum densely rugose-punctate, ± matte. Mesopleuron and metapleuron coarsely rugosepunctate. Juxtacoxal carina present. Scutellum slightly convex, 1.2x longer than wide, without lateral carina, densely punctate. Area superomedia rectangular, 1.5x longer than wide, rugose; costula absent. Area petiolaris rugose, without lateral carina. Outer dentiparal edge with short, blunt tooth. Hind coxa densely punctate dorsally, with scattered punctures ventrally, without scopa. Hind femur slender, 5.3x longer than wide, with scattered punctures in ventral 1/3. Claws not pectinate.

Areolet pentagonal, frontal distance of intercubiti 5x their width; 2 nd recurrent vein reaching areolet slightly distal of its middle. Nervulus postfurcal (2x its width).

Metasoma semi-amblypygous, hypopygium moderately elongate, with some stiff oblique hairs at apical margin. Postpetiole moderately widened, without distinct dorsal carina; median field not distinctly separated, with fine aciculation; lateral field punctate. Gastrocoelus almost triangularly impressed, with some fine longitudinal ridges; thyridium oblique, c. 0.8x as wide as the interval. 2 nd tergite 1.1x wider than long. 2 nd and 3 rd tergites with fine dense punctures and fine granulation, but ± shining. Following tergites with superficial granulation, strongly shining. 2 nd to 4 th sternites with weak median folds. Ovipositor sheath not extending behind metasomal apex.

Colour: Black. Flagellomeres 10-16 with yellow stripes. Dark red are mandible except teeth, apical half of clypeus, face, ventral gena, frontal orbit (widened dorsally), scape ventrally, collare and hind edge of pronotum, two paramedian stripes on mesoscutum, tegula and scutellum. 1 st tergite black; 2 nd and 3 rd tergites dark red, with wide apical black bands, following tergites dark red, 7 th tergite retracted and not visible. Coxae and trochanters black; legs otherwise red. Wings with distinct brownish infuscation; pterostigma reddish.

♂ unknown.

R e m a r k: This new taxon resembles Diphyus fuscatorius (HEINRICH) from Myanmar, but differs by its shorter basal flagellomere, entirely red femora, elongate area superomedia, and median folds on basal sternites.