Homotropus crassicornis Thomson 1890

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 64

Homotropus crassicornis Thomson 1890

Homotropus brevicornis Thomson 1890 (synonym by homotypy; Thomson used the name crassicornis in his key but brevicornis in the description)

Homocidus asyntactus Schmiedeknecht 1926

Diagnosis. Fore wing length 5.1–6.5 mm. Antenna in females with 19 flagellomeres, with multiporous plate sensilla also present ventrally; in males with 20 flagellomeres and with narrow, long but usually inconspicuous tyloids on flagellomeres 2/3 to 12/13. Face strongly coriaceous and distinctly punctate, especially centrally. Clypeus weakly excised, lobes rounded. Mesopleuron smooth and shining, strongly punctate over most of its surface. Mesoscutum smooth and shining, strongly punctate. Hind coxa with hind surface smooth and shining between seta roots. Fore wing areolet open or closed. Propodeum with carination complete and strong, although carinae around petiolar area are sometimes only present as rugae; strongly rugose, especially on petiolar area. Metasoma of both sexes dorsoventrally depressed. First tergite with median dorsal carinae clearly surpassing middle of the tergite, usually almost reaching apex, rugose but without longitudinal wrinkles, 0.9–1.1 times as long as wide; second tergite basally irregularly rugose, 0.5–0.65 times as long as wide, second tergite 0.8–0.95 times as long as first tergite; spiracle of third tergite on dorsal part, above lateral fold.

Colouration of females. Antenna orange or brown. Head and mesosoma black, with yellow on central face patch separated from yellow on clypeus, yellow on mouthparts, sometimes hind corner of pronotum, tegula, upper mesepimeron; scutellum black. Legs orange, all coxae black, femora orange, hind tibia orange with apex dark, hind tarsus dark. Metasoma black.

Colouration of males. As in females but additionally with yellow face, yellow on antenna below, epicnemium and spot on lower mesopleuron, subtegular ridge, often small shoulder marks, mesepimeron, coxae apically, sometimes hind tibia yellow with dark apex.

Material examined. Syntype of Homotropus crassicornis = Homotropus brevicornis Thomson: France, Vendée, Saint-Germain-de-Prinçay. 1♀, at ZIL.

New for Hungary: Szászkézd, leg. Silbernagel. 1♀, at TMA . New for Slovenia: Untersteiermark, Podčetrtek, leg. Dr.Jäger, 2.VII.1933. 1♀, at ZSM.

Germany (6), Hungary (1), Italy (1), Sweden (7).

Distribution. Western Palaearctic.

Figures. Propodeum ( Fig. 14 N), metasoma ( Fig. 15 B), propodeum ( Fig. 15 D), habitus ( Fig. 30 F).

Notes. Syrphoctonus robustus Davis from North America is probably a synonym, but I have not seen any type material.

Figures

FIGURE 30. Habitus of Diplazontinae species. A. Diplazon zetteli sp. nov. B. Enizemum ornatum. C. Episemura ensata. D. Eurytyloides umbrinus sp. nov. E. Fossatyloides gracilentus. F. Homotropus crassicornis.

FIGURE 14. A. Phthorima compressa ♀, metasoma. B. Enizemum ornatum ♀, hind tibia. C. Enizemum ornatum ♂, hind tibia. D. Homotropus frontorius ♀, hind tibia. E. Enizemum ornatum ♀, first tergite. F. Enizemum nigricorne ♀, first tergite. G. Homotropus elegans ♀, first tergite. H. Homotropus sundevalli ♀, first tergite. I. Enizemum ornatum ♀, clypeus. J. Homotropus elegans ♀, clypeus. K. Fossatyloides gracilentus ♂, antenna. L. Fossatyloides gracilentus ♀, propodeum. M. Homotropus pictus ♀, propodeum. N. Homotropus crassicornis ♀, propodeum.

FIGURE 15. A. Syrphophilus tricinctorius ♀, metasoma. B. Homotropus crassicornis ♀, metasoma. C. Bioblapsis polita ♀, propodeum and first tergite. D. Homotropus crassicornis ♀, propodeum and first tergite. E. Bioblapsis polita ♀, metasoma. F. Bioblapsis polita ♀, antenna. G. Woldstedtius citropectoralis ♀, apical metasomal segments and ovipositor sheaths. H. Diplazon neoalpinus ♀, apical metasomal segments and ovipositor sheaths. I. Homotropus signatus ♀, apical metasomal segments and ovipositor sheaths.