Diphyus quinquecinctus himalayaensis, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1131-1132

Diphyus quinquecinctus himalayaensis nov.ssp.

Holotype: ♀ "Westnepal, Simikot, 3100 m, 29°58´25´´N 81°49´07´´E, 18.VI.2001, leg. Creutzburg " ( SDEI).

Paratype: ♀ " Nepal, Distr. Humla, 20 km NW Simikot , 2 km S Chala 3200 m, 29°59´27´´N 81´37´30´´E, 25.-26.VI.2001, Kaireng Khola , leg. F. Creutzburg " ( SDEI).

D e s c r i p t i o n: ♀: Body length 14 mm. Flagellum bristle-shaped, with 48 flagellomeres; 1 st flagellomere 2.4x longer than wide, widest flagellomeres 1.2x wider than long. Temple long, moderately and roundly narrowed behind eye, dorsally 1.0x as long as eye. Distance of lateral ocellus to eye 1.3x ocellar diameter. Frons with coarse transverse rugae. Face densely rugose-punctate. Clypeus densely punctate, with sharp and almost straight apical margin. Gena very wide, 1.4x wider than eye, with coarse rugae dorsally, ventrally swollen, shining and with scattered punctures. Malar space 0.8x as long as width of mandibular base. Mandible with two teeth, upper tooth blunt apically, lower tooth very small. Genal carina reaching hypostomal carina away from mandibular base; hypostomal carina slightly widened.

Mesosoma covered with fine brownish hairs. Notaulus not impressed. Mesoscutum densely rugose-punctate and with fine granulation, but ± shining. Mesopleuron and metapleuron coarsely rugose-punctate. Juxtacoxal carina absent. Scutellum almost flat, 1.3x longer than wide, with fine scattered punctures, without lateral carina. Area superomedia about square, rugose; costula absent. Area petiolaris rugose, bordered by irregular lateral rugae. Outer dentiparal edge with rather strong, blunt tooth. Hind coxa densely punctate, without scopa. Hind femur 4.3x longer than wide, with scattered punctures in

ventral half. Claws not pectinate. Areolet pentagonal, frontal distance of intercubiti 4x their width; 2nd recurrent vein

reaching areolet slightly distal of its middle. Nervulus postfurcal (2x its width).

Metasoma amblypygous, stout and with blunt apex. Hypopygium large, with some stiff oblique hairs. Postpetiole strongly widened; lateral field rugose-punctate, c. 0.6x as wide as median field; median field with coarse longitudinal striation. Gastrocoelus almost triangularly impressed, with some fine longitudinal ridges; thyridium indistinctly impressed. 2 nd tergite wide, 1.4x wider than long. 2 nd and 3 rd tergites very finely and densely rugose-punctate, matte. Following tergites with superficial granulation, strongly shining. 2 nd to 4 th sternites with median folds. Ovipositor sheath slightly extending behind metasomal apex.

Colour: Black. Antenna reddish, flagellomeres 7-14 yellowish-red, distal flagellomeres reddish-brown. Mandible except teeth, sometimes clypeus laterally and tegula reddish. Wide facial orbit and narrow frontal orbit, spot on collare, hind edge of pronotum and complete scutellum yellow. Metasoma black; wide basal bands and 2 nd and 3 rd tergites, apical bands of 4 th to 7 th tergites and apical margins of 2 nd to 5 th sternites yellow. Coxae black; trochanters black basally and red apically. Legs otherwise red; tibia with subbasal yellowish stripes externally; hind femur in apical 0.5 and hind tibia in apical 0.2 blackish. Wings with yellowish infuscation; pterostigma reddish.

♂ unknown.

R e m a r k: This new subspecies is rather similar to Diphyus quinquecinctus quinquecinctus (KRIECHBAUMER, 1882) which is known from Europe and Central Asia ( HEINRICH 1978). It differs by the coarser surface structure of the mesosoma, wider yellow colouration of facial orbit, yellow hind margins of 2 nd to 5 th sternites and mainly reddish instead of yellowish colouration of tibiae and tarsi.