Ichneumon creutzburgi, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1135-1136

Ichneumon creutzburgi nov.sp. ( fig. 28 )

Holotype: ♀ " Nepal, Prov. Karnalo 20 km NW Simikot , 3500 m, 29°58´49´´N 81°38´23´´E, 28.VI.2001 Wacholderwiese Gelbschale, leg. F. Creutzburg " ( SDEI).

D e s c r i p t i o n: ♀: Body length 12.5 mm. Flagellum bristle-shaped, with 42 flagellomeres; 1 st flagellomere 3.0x longer than wide, c. 14 th flagellomere square; widest flagellomeres 1.1x wider than long; preapical flagellomere 1.8x longer than wide. Head covered with short brownish hairs. Temple moderately and almost linearly narrowed behind eye, dorsally 0.7x as long as eye. Distance of lateral ocellus to eye 1.8x ocellar diameter. Frons coarsely rugose-punctate. Face rugose-punctate. Clypeus densely punctate, almost flat, apical margin sharp and almost straight.. Gena 1.2x wider than eye, densely punctate. Malar space 1.2x longer than width of mandibular base. Mandible narrow; upper tooth about 3x longer than lower one. Genal carina reaching hypostomal carina away from mandibular base; both carinae low.

Mesosoma covered with brownish hairs. Side of pronotum and mesoscutum densely rugose-punctate, matte. Notaulus not impressed. Mesopleuron and metapleuron coarsely rugose-punctate; juxtacoxal carina complete. Scutellum slightly elevated, about as long as wide, densely punctate, without lateral carina. Propodeum coarsely rugose. Area superomedia square; costula absent. Area petiolaris rugose, with lateral carina. Hind coxa densely punctate, without scopa. Hind femur with scattered punctures in ventral third, 4.4x longer than wide. Claws not pectinate.

Areolet pentagonal, frontal distance of intercubiti c. 3x their width; 2 nd recurrent vein slightly distal to its middle. Nervulus postfurcal (3x its width).

Metasoma oxypygous. Postpetiolus strongly widened apically, without dorsal carina. Lateral field c. 0.6x as wide as median one; both fields with coarse longitudinal striation. Gastrocoelus distinctly impressed and with strong ridges. Thyridium slightly oblique, c. 0.9x as wide as the interval. 2 nd tergite 1.2x wider than long. 2 nd and 3 rd tergites densely rugose-punctate, ± matte; 2 rd tergite finely striate medially. Following tergites with fine granulation and shining. Apical tergites slightly compressed, metasomal apex with distinctly narrowed sides. Ovipositor sheath slightly extending behind metasomal apex.

Colour: Black. Flagellomeres 8-13 with ivory rings. Frontal orbit opposite to antennal groove with weak narrow yellowish spot. Scape ventrally reddish. Mesosoma black; tegula reddish; scutellum ivory. Metasoma black; 2 nd tergite completely and sides of 3 rd tergite narrowly red. Coxae and trochanters black; legs otherwise red; fore tibia frontally and all tarsi yellowish-red. Wings distinctly yellow infuscate; pterostigma yellow.

♂ unknown.

R e m a r k: This new taxon is characterized by the bristle-shaped flagellum, slender and apically compressed metasoma, and absence of ivory marks on apical tergites as it is found in members of the genus Stenichneumon THOMSON, but the structure and width of thyridia are typical for a Ichneumon species.

Figures

Figs 26-29: Habitus from dorsal: (26) Ichneumon cavigena nov.sp. ♀, (27) Ichneumon cavigena nov.sp. ♂, (28) Ichneumon creutzburgi nov.sp. ♀, (29) Ichneumon longigenalis nov.sp. ♀.