Syrphophilus bizonarius

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 101

Syrphophilus bizonarius ( Gravenhorst 1829, Bassus)

Bassus cingulatus Holmgren 1858

Bassus frontalis Brischke 1878 (homonym)

Zootrephes inconstans Davis 1895

Bassus saginatus Provancher 1879

Homocidus iwatensis Uchida 1930

Homocidus satoi Uchida 1930

Diagnosis. Fore wing length 3.5–4.5 mm. Antenna of both sexes with 17–21 flagellomeres. Mesoscutum smooth and shining between weak punctures. Mesopleuron smooth and shining between weak punctures which are more than their diameter apart. Sternaulus strongly impressed. Propodeum with a full set of strong carinae enclosing basal, lateral and petiolar areas, the areas with rugose sculpture. First tergite with median dorsal carinae strongly developed at least on basal half. Second and third metasomal tergites strongly punctate against a smooth and polished or sometimes more coriaceous background.

Colouration of females. Antenna brown to orange, often paler below. Head and mesosoma black, face with yellow inner orbits, yellow on clypeus, mouthparts, hind corner of pronotum, tegula, sometimes subtegular ridge, small to large shoulder mark, and upper mesepimeron; scutellum usually yellow, at least with yellow apex. Legs orange, coxae and often mid and hind trochanters black; femora orange, marked with black below, sometimes hind femur all dark; hind tibia orange with apex and sometimes base dark, hind tarsus dark. Metasoma orange on tergites 2 to 3 or 4 but sometimes dark and only with orange or yellow apical bands on tergites 2 to 3.

Colouration of males. As in females but with yellow ventrally on scape, pedicel and sometimes basal flagellomeres, face with yellow inner orbits and a central yellow spot. Fore and mid coxae sometimes entirely yellow, hind coxa black with a yellow apex. Metasoma as in females but often tergites 2 and 3 black basally.

Material examined. Lectotype of Bassus cingulatus Holmgren : Sweden, Lapland, leg. Boheman. 1♂, at NRM.

New for North Korea: Prov. Ryang-Gang, Hyesan, Mt. Ze-dong, 1150m, leg. J.Papp & J.Vojnits, 26.VII.1975. 2♂, at TMA . New for Ukraine: SE, Lugansk reg, Provalie, leg. Osipov, 23.V.2003. 1♀, at MR . New for Vietnam: Tonkin, Hoang Lien N.R., 10 km SW Sa Pa, c. 1550m, leg. C.v.Achterberg, 23.X.1999. 1♀, 26.–28.X.1999. 1♀, 24.X.1999, 1♀, all at RMNH.

Finland (6), Germany (2), Hungary (12), Italy (1), North Korea (2), Norway (3), Russia (6), Spain (1), Sweden (>100), Switzerland (50), Turkey (2), Ukraine (1), United Kingdom (1), Vietnam (3).

Distribution. Holarctic and Oriental.

Figures. Sternaulus ( Fig. 25A ), habitus ( Fig. 35 B).

Figures

FIGURE 25. Sternaulus in Syrphophilus. A. Syrphophilus bizonarius with a very deeply impressed sternaulus. B. Syrphophilus tricinctorius with the sternaulus distinct but less deeply impressed. Scale bars represent 500 µm.

FIGURE 35. Habitus of Diplazontinae species. A. Syrphophilus asperatus. B. Syrphophilus bizonarius. C. Syrphophilus scabriculus. D. Tymmophorus erythrozonus. E. Tymmophorus obscuripes. F. Tymmophorus suspiciosus.