Homotropus megaspis Thomson 1890

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 68

Homotropus megaspis Thomson 1890

Homotropus megalaspis Schulz 1906

Diagnosis. Fore wing length 4.5–6 mm in males and 6–7.8 mm in females. Antenna of both sexes with 19 to 21 flagellomeres, in females, apical flagellomeres with multiporous plate sensilla also present ventrally, in males with narrow, long tyloids on flagellomeres 7 to 14/15. Face strongly coriaceous and distinctly punctate, especially centrally. Clypeus strongly excised, with lobes rounded. Mesopleuron with some coriaceous areas on lower half, otherwise smooth and shining, strongly punctate over more than half of its surface. Mesoscutum smooth and shining but sometimes with some finely coriaceous areas, especially on median part, strongly punctate. Hind coxa with hind surface coriaceous on basal half, apically smooth and shining between seta roots. Fore wing areolet closed, vein 3rs-m sometimes unpigmented. Propodeum at most with metapleural and parts of lateral longitudinal carina present, mostly coriaceous. Female metasoma dorsoventrally depressed. First tergite with median dorsal carinae indicated at least basally, with area between carinae covered with numerous strong longitudinal wrinkles, tergite 0.9–1.1 times as long as wide in females, 1.2–1.5 in males; second tergite basally with some strong longitudinal wrinkles, 0.6–0.7 times as long as wide in females, 0.7–1.0 in males, second tergite 0.9–1.0 times length of first tergite; spiracle of third tergite on dorsal part, above lateral fold.

Colouration of females. Antenna black. Head and mesosoma black, with yellow on central face patch usually confluent with yellow on clypeus, yellow on mouthparts, hind corner of pronotum, tegula, subtegular ridge, large shoulder mark, mesepimeron, scutellum laterally. Hind part of mesopleuron and metapleuron sometimes marked with orange (cf. form rufipleuris Habermehl). Legs orange, fore and mid coxae yellow, hind coxa orange, femora orange, often yellow-marked apically, hind tibia white with apex, base and sometimes a subbasal spot dark, hind tarsus dark. Metasoma black.

Colouration of males. As in females but additionally with yellow over entire face, scape, pedicel and usually flagellomeres ventrally, propleuron, mesosternum and lower mesopleuron, shoulder marks large and recurved, fore and mid and often basally on hind coxae, and often basal spots on tergites 3 and 4.

Material examined. Holotype of Homotropus megaspis Thomson : Germany, Bavaria, leg. A. Kriechbaumer, 11.IX.1873. 1♀, at ZSM.

New for Austria: Oberösterreich, Brunnwald bei Bad Leonfelden, leg. Martin Schwarz, 21.VIII.1985. 1♂, at ZSM.

Austria (1), Germany (3), Hungary (4), Switzerland (2), United Kingdom (2).

Distribution. Palaearctic.