Ichneumon tricoloratus, Riedel, 2019

Riedel, Matthias, 2019, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Nepal, Linzer biologische Beiträge 51 (2), pp. 1119-1162 : 1140-1141

Ichneumon tricoloratus nov.sp. ( fig. 33 )

Holotype: ♀ " Nepal, Maharigaon Nörd. 29°22´26´´N 82°23´26´´E, 4400 m, 18.06.1997, leg. Creutzburg " ( SDEI).

D e s c r i p t i o n: ♀: Body length 9 mm. Flagellum filiform, with 35 flagellomeres; 1 st flagellomere 1.5x longer than wide, 8 th flagellomere square; widest flagellomeres 1.4x wider than long, preapical flagellomere 0.6x as long as wide. Temple parallel behind eye, slightly narrowed apically, dorsally 0.85x as long as eye. Distance of lateral ocellus to eye 1.2x ocellar diameter. Occiput rugose. Frons coarsely rugose-punctate. Face punctate, punctation medially and on facial orbit scattered. Clypeus with scattered punctures, shining. Mandible with two teeth, lower tooth distinct, smaller than upper one. Gena 1.6x wider than eye, with scattered punctures ventrally. Malar space as long as width of mandibular base. Genal carina reaching hypostomal carina far from mandibular base, both carinae low.

Mesosoma covered with reddish hairs. Side of pronotum punctate dorsally and rugose ventrally. Notaulus impressed at frontal margin of mesoscutum. Mesoscutum with dense confluent punctures, shining. Mesopleuron and metapleuron coarsely and densely punctate, partly striate; juxtacoxal carina present. Scutellum almost flat, 1.3x wider than long, without lateral carina, with very scattered punctures. Propodeum coarsely rugose. Area superomedia rectangular, about as long as wide; costula absent. Area petiolaris rugose, without lateral carina. Hind coxa with coarse punctures, punctation very scattered in ventro-apical 1/2. Hind femur with scattered punctures proximally and in

ventral half, 3.6x longer than wide. Claws not pectinate. Areolet pentagonal, frontal distance of intercubiti c. 3x their width; 2nd recurrent vein in

the middle. Nervulus strongly postfurcal (3x its width).

Metasoma stout, oxypygous. Postpetiolus moderately widened apically, without distinct dorsal carina. Lateral field 0.65x as wide as median one; median field with rather coarse superficial aciculation. Gastrocoelus slightly impressed, smooth. Thyridium small, slightly oblique, c. 0.5x as wide as the interval. 2 nd tergite with fine dense punctures, smooth and shining, with fine rugose striation between thyridia. 3 rd tergite with superfi-

cial punctures, shining. Following tergites almost smooth and strongly shining. Ovipositor sheath moderately extending behind metasomal apex (by length of 7 th tergite).

Colour: Reddish. Head red; antenna tricoloured: Scape, pedicle and basal flagellomeres red, flagellomeres 9-14 yellowish, flagellomeres 15-19 reddish and flagellomeres 20-35 blackish. Frontal orbit up to vertex with narrow yellow stripe. Occiput partly black. Mesosoma red; propleuron, side of pronotum centrally, margins of mesopleuron and metapleuron, entire mesosternum, area beside scutellum, and basal and apical margins of propodeum blackish. Metasoma red; 1 st to 3 rd tergites with wide basal black bands; apical band of postpetiolus, posterolateral spots on 2 nd to 4 th tergites and median spots on 6 th and 7 th tergites yellow. Legs red; fore and mid trochanters black basally. Wings slightly infuscate; pterostigma yellow.

♂ unknown.

R e m a r k: This new taxon is closely related to I. americanicolor HEINRICH and I. annaelisae HEINRICH, but differs by its smaller size and extended yellow colouration of the metasoma. It is not impossible that it represents a variant of I. americanicolor from higher mountain areas.

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. ♀.