Syrphophilus scabriculus (Holmgren 1858, Bassus) Bioblapsis tricincta Ashmead 1902 (syn. nov.) Diagnosis. Fore wing length 3.5–4.8 mm. Antenna of both sexes with 16–18 flagellomeres. Mesoscutum smooth with some fine sculpture centrally, punctures with margins indistinct and restricted to anterior margin. Mesopleuron smooth with some fine sculpture on lower half. Sternaulus weakly impressed. Propodeum with a full set of strong carinae enclosing basal, lateral and petiolar areas, the areas with rugose to coriaceous sculpture. First tergite with median dorsal carinae usually only present on basal third. Second and third metasomal tergites with punctures indistinct against the rugulose or coriaceous background. Colouration of females. Antenna black. Head and mesosoma black, yellow inner orbits often restricted to above the antennae, yellow or orange on clypeus and mouthparts, yellow on hind corner of pronotum, tegula, and sometimes upper mesepimeron; without yellow shoulder marks, scutellum black. Legs orange, coxae and trochanters black; femora orange, marked with black ventrally; hind tibia orange with apex dark, hind tarsus dark. Metasoma black with orange or yellow apical bands on tergites 2 to 3 or 4. Colouration of males. As in females but with yellow ventrally on scape and pedicel, face with yellow inner orbits and a central yellow spot, mesosoma black. Fore and mid coxae with yellow apices, trochanters sometimes yellow. Metasoma as in female. Material examined. Lectotype of Bassus scabriculus Holmgren: Sweden, Dalarna, leg. Boheman. 1♀, at NRM (hereby designated). Holotype ♂ of Bioblapsis tricincta Ashmead: USA, Alaska, Berg Bay, 10.VII.1899, 1♂ (damaged), at USNM. New for Finland: InL Utsajoki, Kevo, leg. Jussila, 13.VII.1959. 1♂, 1♀, at NMBE; EnL, Enontekiö, Toskaljärvi 7689:280, leg. Jussila, 15.VII.2007. 1♀, at RJ; InL Utsajoki, Kevo, leg. Jussila, 13.VII.1959. 1♂, at RJ; Utsjoki Li, leg. Karvonen, 2.VII.1967. 1♀, at RJ. New for Norway: Dovrefjell, Kongsvoll, 1000–1500m, leg. J.E. & R.B. Benson, 25.VI.–3.VII.1966. 1♀, 8.–27.VI.1967. 3♂, 4♀; Buskerund Fylke, Geijo, 1000–1100m, leg. J.E. & R.B. Benson, 16.–24.VI.1965. 1♀; all at BMNH; Telemark, 3 km E Kalhovd, 900–1000m, N60°04', E8°23', leg. Munk, 27.VII.1987. 2♀, at MR. Canada (1), Finland (4), Norway (11), Sweden (30). Distribution. Holarctic. Figures. Habitus (Fig. 35 C). Notes. This species was formerly known as Syrphophilus tricinctus (Ashmead), but examination of the type of Bassus scabriculus Holmgren showed that this is not a synonym of S. tricinctorius but instead identical with the former species.

Published as part of Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), pp. 1-143 in Zootaxa 3801 (1) on pages 101-102, DOI: 10.11646/zootaxa.3801.1.1, http://zenodo.org/record/249944