Homotropus longiventris Thomson 1890

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 67-68

Homotropus longiventris Thomson 1890

Diagnosis. Fore wing length 3.6–4.8 mm. Antenna in females with 19 to 20 flagellomeres, apical flagellomeres with multiporous plate sensilla also present ventrally; in males with 20 to 22 flagellomeres and with narrow, long tyloids on flagellomeres 7 to 14/15. Face strongly coriaceous and distinctly punctate, especially centrally. Clypeus weakly excised, with lobes somewhat angulate at outer corners. Mesopleuron weakly coriaceous on lower half, smooth and shining on upper half, with some weak and rather sparse punctures on lower half and along anterior margin. Mesoscutum finely coriaceous, especially on median part, strongly punctate. Hind coxa with hind surface mostly smooth and shining between seta roots, coriaceous only basally. Fore wing areolet closed, vein 3rs-m usually unpigmented. Propodeum with only pleural carina and apical parts of longitudinal carinae present, coriaceous. Female metasoma elongate and parallel-sided. First tergite without median dorsal carinae, with few longitudinal wrinkles, 1.0–1.3 times as long as wide; second tergite basally with numerous longitudinal wrinkles often reaching center of tergite, 0.9–1.2 times as long as wide, second tergite 1.15–1.4 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 bright yellow on central face patch confluent with yellow on clypeus, yellow on mouthparts, hind corner of pronotum, tegula, subtegular ridge, large shoulder mark, mesepimeron, scutellum laterally and apically. Legs orange, fore and mid coxae yellow, hind coxa orange, femora yellow or orange, hind tibia white with apex, base and a subbasal spot dark, hind tarsus dark. Metasoma black.

Colouration of males. As in females but additionally with yellow over entire face, scape and pedicel ventrally, propleuron, hind part of pronotum, mesosternum and at least a stripe on lower mesopleuron, apex of hind coxa, and often basal spots on tergites 3 to 4 or 5.

Material examined. Lectotype of Homotropus longiventris Thomson : Sweden, Skåne, Pålsjö. 1♀, at ZIL.

New for Bulgaria: Rila-Kloster, 15.VII.1974. 1♀, at ZSM. New for Italy: Garda, Campi Riva, leg. Haesselbarth, 7.IX.1967. 4♂, at ZSM.

Bulgaria (1), Finland (13), Germany (2), Italy (2), Norway (1), Sweden (70), Switzerland (16), United Kingdom (30).

Distribution. Palaearctic.

Figures. Metasoma ♀ ( Fig. 20 G), habitus ( Fig. 31 D), male terminal sclerites ( Fig. 37 G).

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.

FIGURE 31. Habitus of Homotropus species. A. Homotropus dimidiatus. B. Homotropus elegans. C. Homotropus frontorius. D. Homotropus longiventris. E. Homotropus nigritarsus. F. Homotropus pallipes.

FIGURE 37. Ninth sternite and ninth and tenth tergites of male Diplazontinae species. A. Daschia brevitarsis. B. Diplazon angustus. C. Diplazon scutatorius. D. Diplazon zetteli. E. Enizemum ornatum. F. Homotropus dimidiatus. G. Homotropus longiventris. H. Homotropus melanogaster. I. Homotropus nigrolineatus. J. Phthorima xanthaspis.