Homotropus strigator ( Fabricius 1793, Ichneumon

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 73-74

Homotropus strigator ( Fabricius 1793, Ichneumon ) (comb. nov.)

Bassus ruficornis Holmgren 1858 (homonym)

Diagnosis. Fore wing length 4.3–6 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. Face strongly coriaceous and distinctly punctate, especially centrally. Clypeus strongly excised, with lobes somewhat angulate at outer corners. Mesopleuron coriaceous and strongly punctate over almost entire surface. Mesoscutum finely coriaceous, especially on median part, strongly and densely punctate. Hind coxa with hind surface smooth and shining but coriaceous and matt on basal half. Fore wing areolet closed, vein 3rs-m pigmented or unpigmented. Propodeum with only pleural carina and lateral longitudinal carinae complete but with transverse carina and often also petiolar carina partly present or at least indicated by strong rugae; coriaceous, more rugose on petiolar area. Female metasoma gradually tapered posterior to third segment. First tergite with median dorsal carinae usually only present basally but sometimes surpassing middle of tergite, with some longitudinal wrinkles, 1.0–1.2 times longer than wide in females, 1.2–1.5 in males; second tergite basally with few short but strong longitudinal wrinkles, 0.5–0.65 times as long as wide in females, 0.65–0.8 in males, second tergite 0.75–0.95 times as long as first tergite; spiracle of third tergite on dorsal part, above lateral fold.

Colouration of females. Antenna bright orange. Head and mesosoma black, with yellow on clypeus, mouthparts, hind corner of pronotum, tegula, subtegular ridge, shoulder mark, mesepimeron, scutellum at most with apical spot. Legs orange, all coxae orange, femora orange, hind tibia white with a dark apex and base, hind tarsus dark. Metasoma black.

Colouration of males. As in females but additionally with yellow over entire face, antenna ventrally, most of propleuron, mesosternum and mesopleuron, fore and mid coxae, and often basal spots on tergites 3 and 4.

Material examined. Lectotype of Bassus ruficornis Holmgren : Sweden, Östergötland, leg. Boheman.1♀, at NRM (hereby designated).

Additional material. Germany: Isar, leg. Kriechbaumer, 7.IX.1972. 1♀, at ZSM; Einbeck, 30.VI.1968. 1♀, at ZSM ; Thüringen, Blankenburg. 1♂, at ZSM . Poland: Trzcianne at Monki, leg. J.Sawoniewicz, 14.VIII.1982. 1♂, at ZSM . Sweden: Gotland 1♀, Småland 1♂, Stockholm 2♂, all leg. Boheman, all at NRM .

Figures. Propodeum ( Fig. 20 C).

Figures

FIGURE 20. Homotropus characters mentioned in the species key. A. Homotropus melanogaster ♀, metasoma. B. Homotropus frontorius ♀, metasoma. C. Homotropus strigator ♀, propodeum. D. Homotropus pictus ♀, propodeum. E. Homotropus collinus ♀, clypeus. F. Homotropus elegans ♀, clypeus. G. Homotropus longiventris ♀, metasoma. H. Homotropus pictus ♀, metasoma. I. Homotropus venustus ♂, antenna showing tyloids. Scale bars represent 500 µm.