Homotropus elegans (Gravenhorst 1829, Bassus) Bassus rufonotatus Holmgren 1858 Homotropus affinis Szépligeti 1898 Diagnosis. Fore wing length 4.1–5 mm. Antenna in females with 18 to 20 flagellomeres, apical flagellomeres with multiporous plate sensilla also present ventrally; in males with 20 to 21 flagellomeres and with narrow, long tyloids on flagellomeres 7 to 14/15. Face strongly coriaceous and distinctly punctate, especially centrally. Clypeus very weakly excised, with lobes somewhat angulate at outer corners. Mesopleuron coriaceous on lower half, strongly punctate over most of its surface. Mesoscutum smooth and shining or at most finely coriaceous, strongly and densely punctate. Hind coxa with hind surface basally coriaceous, apically rather smooth and shining. Fore wing areolet closed, vein 3rs-m usually unpigmented. Propodeum with only metapleural and lateral longitudinal carinae present but sometimes with some rugae on petiolar area which partly indicate the location of the petiolar carinae; coriaceous, rather smooth and rugose on petiolar area. Female metasoma dorsoventrally depressed. First tergite without median dorsal carinae, with few longitudinal wrinkles, as long as wide in females and 1.2–1.3 times longer than broad in males; second tergite basally with few longitudinal wrinkles, 0.55–0.65 times as long as wide in females, 0.7–0.8 in males, second tergite 0.8–0.9 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 separated from yellow on clypeus, yellow on mouthparts, hind corner of pronotum, tegula, subtegular ridge, often large shoulder mark, mesepimeron, scutellum usually with an apical spot. Legs orange, all coxae black, femora orange, hind tibia orange with apex dark, hind tarsus dark. Metasoma black, tergites 2–4 and sometimes parts of tergites 1 and 5 orange. Colouration of males. As in females but additionally with yellow over entire face, ventrally on scape, epicnemium, often stripe on lower mesopleuron, coxae apically, sometimes basal spots on tergite 3; metasoma often only partly orange on tergites 2–4. Material examined. Lectotype of Bassus rufonotatus Holmgren: Sweden, Lapland, leg. Boheman. 1♂, at NRM (hereby designated). Holotype of Homotropus affinis Szépligeti: Hungary. 1♀, at TMA. New for Switzerland: Bern, Amselberg, leg. T.Steck, 6.X.1926. 1♀, at NMBE. Austria (1), Finland (1), Germany (2), Hungary (14), Italy (1), Russia (3), Sweden (40), Switzerland (50), Turkey (1), United Kingdom (2). Distribution. Holarctic. Figures. First tergite ♀ (Fig. 14 G), clypeus (Fig. 14 J), habitus (Fig. 31 B).

Published as part of Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), pp. 1-143 in Zootaxa 3801 (1) on pages 65-66, DOI: 10.11646/zootaxa.3801.1.1, http://zenodo.org/record/249944