Ichneumon yunnanensis, Riedel, 2023

Riedel, Matthias, 2023, Five new Oriental species of the genus Ichneumon LINNAEUS (Hymenoptera, Ichneumonidae, Ichneumoninae), Linzer biologische Beiträge 55 (1), pp. 47-60 : 56

Ichneumon yunnanensis nov.sp. ( Figs 17-19 )

M a t e r i a l e x a m i n e d: Holotype: (♀) China-Yunnan prov. , 10 km E of Yunlong vill. 17.-18.viii.1998, O. Safránek et M. Trýzna lgt. ( ZSM).

E t y m o l o g y: The species name refers to the collection site, the Chinese province Yunnan.

D e s c r i p t i o n: Body length 15 mm. Flagellum filiform, with 41 flagellomeres; 1 st flagellomere 1.7 × longer than wide; about 8 th flagellomere square; preapical flagellomere 0.7 × as long as wide. Temple slightly and roundly narrowed behind eye, dorsally 0.9 × as long as eye. OED 1.7 × ocellar diameter. Frons and vertex with coarse and rugose punctures, dull. Face densely punctate, partly rugose. Clypeus with sparse punctures, shining. Gena with sparse punctures ventrally. Malar space 1.1 × longer than width of mandibular base. Genal carina reaching hypostomal carina far from mandibular base; hypostomal carina slightly elevated.

Mesosoma with pale hairs. Side of pronotum with fine dense punctures. Notaulus impressed at frontal margin of mesoscutum. Mesoscutum with dense punctures, shining. Mesopleuron densely punctate, shining. Metapleuron punctate, partly rugose; juxtacoxal carina absent. Scutellum flat, slightly wider than long, punctate, without lateral carina. Propodeum coarsely rugulose-punctate. Area superomedia rectangular, slightly longer than wide; anterior transverse carina (costula) absent. Hind coxa densely punctate, with a very finely granulated area ventrally but without scopa. Base and ventral third of hind femur with coarse but sparse punctures, hind femur 3.7 × longer than wide. Claws simple. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 4 × their width. Vein 1cu-a postfurcal.

Metasoma oxypygous. Postpetiolus strongly widened apically, without distinct dorsal carina; median field with fine dense aciculation. Gastrocoelus slightly impressed and with some fine striae. Thyridium small, oblique, 0.7 × as wide as the interval between thyridia. 2 nd tergite 1.3 × wider than long. 2 nd and 3 rd tergites with fine dense punctures and fine granulation, moderately shining; 2 nd tergite with fine longitudinal rows of punctures between thyridia, but without distinct aciculation; 4 th tergite superficially punctate; following tergites almost smooth and strongly shining.

Color: black. Reddish are occiput and part of frons, side of clypeus, tegula and mesoscutum (except diffuse longitudinal blackish median and lateral stripes). Ivory are flagellomeres 8-15 dorsally, wide facial and narrow frontal orbits up to vertex, frontal and upper margins of pronotum, subtegular ridge, scutellum, large spot on dentiparal area, wide apical band of postpetiolus (narrowed medially), large almost rectangular posterolateral spots on 2 nd to 4 th tergites, large apical spots on 5 th to 7 th tergites (widest on 5 th tergite) and dorsal spots on all coxae. Legs black; tarsi with diffuse dark reddish-brown suffusion. Wings slightly yellowish, pterostigma brownish.

♁ unknown.

D i s t r i b u t i o n: Southern China (Yunnan).

Figures

Figs 17-19: Ichneumon yunnanensis nov.sp. HT: (17) habitus, (18) face, (19) head.