Ichneumon politoventris, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1138-1139

Ichneumon politoventris nov.sp. ( fig. 31 )

Holotype: ♀ " Nepal, Distr. Humla 14 km W Simikot, 3 km NW Sankha La , 4300 m, 29°57´18´´N 81°39´30´´E, 29.-30.VI.2001, yellow trap, leg. F. Creutzburg " ( SDEI).

D e s c r i p t i o n: ♀: Body length 12.5 mm. Flagellum stout and slightly lanceolate, with 33 flagellomeres; 1 st flagellomere 1.4x longer than wide, 2 nd flagellomere square; widest flagellomeres 1.8x wider than long; preapical flagellomere 0.7x as long as wide. Temple slightly and roundly narrowed behind eye, dorsally 0.9x as long as eye. Distance of lateral ocellus to eye 1.3x ocellar diameter. Occiput and frons coarsely rugosepunctate. Face densely punctate, but punctation medially and on facial orbit scattered. Clypeus with coarse but scattered punctures, intervals smooth and shining. Gena 1.7x wider than eye, with scattered coarse punctures ventrally. Malar space as long as width of mandibular base. Mandible rather long and thick, with almost parallel upper and lower margins; lower tooth smaller than upper one. Genal carina reaching hypostomal carina far from mandibular base; both carinae low.

Mesosoma covered with brownish hairs. Side of pronotum densely punctate dorsally and rugose ventrally. Notaulus impressed in frontal fifth of mesoscutum. Mesoscutum densely rugose-punctate, but shining. Mesopleuron and metapleuron coarsely rugose-punctate. Juxtacoxal carina present. Scutellum slightly elevated, 1.4x wider than long, with very scattered punctures, without lateral carina. Propodeum coarsely rugose. Area superomedia rectangular, 1.3x longer than wide; costula absent. Area petiolaris rugose, without lateral carina. Tibiae and tarsi with numerous stiff hairs and spurs. Hind coxa densely punctate, but with scattered punctures ventrally, without scopa. Hind femur stout, densely punctate, 3.0x longer than wide. Claws not pectinate.

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

Metasoma oxypygous. Postpetiolus strongly widened apically, without dorsal carina. Lateral field 0.5x as wide as median one, punctate and slightly rugose; median field with fine aciculation and some punctures. Gastrocoelus small, slightly impressed and with few superficial ridges. Thyridium small, oblique, c. 0.3x as wide as the interval. 2 nd tergite 1.35x wider than long, with fine scattered punctures, otherwise smooth and shining. 3 rd tergite with very fine scattered punctures. Following tergites almost smooth, shining. Ovipositor sheath slightly extending behind metasomal apex.

Colour: Black. Head including scape dark reddish, occiput black. Flagellum black, flagellomeres 8-13 with ivory stripes. Mesosoma black; collare, wide upper margin of pronotum, tegula, subtegular ridge, and mesoscutum red. Scutellum yellow. Metasoma red; 6 th and 7 th tergites reddish-brown, with large median yellow spots. Coxae and trochanters black, partly reddish. Legs otherwise red. Wings moderately brownish infuscate; pterostigma yellowish.

♂ unknown.

R e m a r k: This new taxon is characterized by its unusually smooth structure of basal tergites and very small gastrocoelus and thyridium but is otherwise typical for the genus Ichneumon .

Figures

Figs 30-33: Habitus from dorsal: (30) Ichneumon nepalensis nov.sp. ♀, (31) Ichneumon politoventris nov.sp. ♀, (32) Ichneumon ruficephalus nov.sp. ♀, (33) Ichneumon tricoloratus nov.sp. ♀.