Homotropus nigritarsus,

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143: 69-70

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Homotropus nigritarsus


Homotropus nigritarsus  ( Gravenhorst 1829, Bassus  )

Bassus picitans Desvignes 1862 

Bassus groenlandicus Holmgren 1872 

Diagnosis. Fore wing length 3.3–5.1 mm. Antenna of both sexes with 19 to 20 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 punctate over entire area. Clypeus rather weakly excised, with lobes rounded. Mesopleuron smooth and shining, at most with very restricted coriaceous areas on lower half, strongly punctate over at least half the surface. Mesoscutum smooth and shining, strongly punctate. Hind coxa with hind surface smooth and shining between seta roots, coriaceous only basally. Fore wing areolet closed, vein 3 rs-m usually unpigmented. Propodeum with only pleural carina and apical parts of longitudinal carinae present but with some rugae on petiolar area which partly indicate the location of the petiolar carinae, coriaceous, rugose on petiolar area. Female metasoma gradually tapered posterior to third segment. First tergite without median dorsal carinae, without longitudinal wrinkles, 1.0– 1.4 times as long as wide; second tergite basally with few very short longitudinal wrinkles, 0.5–0.7 times as long as wide in females, 0.6–0.8 in males, second tergite 0.8 –1.0 times as long as first tergite; spiracle of third tergite on dorsal part, above lateral fold.

Colouration of females. Antenna black. Head and mesosoma black, with yellow usually on small central face patch which is separated from yellow on clypeus, yellow on mouthparts, hind corner of pronotum, tegula, subtegular ridge, often large shoulder mark, mesepimeron, scutellum at most with small apical spot. Legs orange, all coxae black, fore and mid coxae often with yellow apex; femora orange, hind tibia orange with apex dark, hind tarsus dark. Metasoma black.

Colouration of males. As in females but additionally with yellow along inner orbits and central face patch, sometimes over entire face, scape and pedicel ventrally, sometimes parts of epicnemium, fore and mid coxae and sometimes hind coxa apically, and often basal spots on tergites 3 and 4.

Material examined. Lectotype of Bassus picitans Desvignes  : United Kingdom. 1 ♂, at BMNH.

New for Ukraine: SE, Lugansk reg, Provalie, leg. Osipov, 19.– 21.VII. 2004. 1♀, at MR.

Bulgaria (1), Finland (1), France (3), Germany (1), Hungary (2), Netherlands (1), Norway (1), Russia (2), Spain (1), Sweden (90), Switzerland (90), Turkey (1), Ukraine (1), United Kingdom (30).

Distribution. Holarctic and Neotropical.

Figures. Male terminal sternite and tergites ( Figs 10View FIGURE 10 C, 10 D), antenna ♂ ( Fig. 13View FIGURE 13. A H), habitus ( Fig. 31View FIGURE 31 E).














Homotropus nigritarsus

Klopfstein, Seraina 2014

Bassus groenlandicus

Holmgren 1872

Bassus picitans

Desvignes 1862