Woldstedtius citropectoralis (Schmiedeknecht 1926, Homocidus)

Bassus abdominator Bridgman 1886 (homonym)

Diagnosis. Fore wing length 3.5–4.8 mm. Antenna of both sexes with 19–21, very rarely 22 flagellomeres. Face broadened and conspicuously widened ventrally, especially in males. Mesopleuron finely and evenly coriaceous. Propodeum devoid of carinae, evenly coriaceous also on petiolar area.

Colouration of females. Antenna black. Head and mesosoma black, face usually with a small yellow face patch which is smaller than central elevated area, clypeus black, yellow on mouthparts, hind corner of pronotum, tegula, sometimes subtegular ridge, with or without small shoulder marks, and upper mesepimeron; scutellum at most with a small yellow apical spot. Mesopleuron sometimes marked with orange below which can extend onto propodeum and first tergite. Legs including coxae orange, fore coxa often dark basally; femora orange; hind tibia black with a white base, hind tarsus dark. Metasoma black, sometimes with some orange markings.

Colouration of males. As in females but with yellow ventrally on antenna, entire face, propleuron, and small yellow shoulder marks; epicnemium, mesosternum and lower mesopleuron usually mostly yellow. Coxae mainly yellow, hind coxa usually marked with orange or black. Metasoma black with yellow spots or bands basally on tergites 3 to 4 or 5.

Material examined. New for Norway: Rygge, Ekeby, Gunnarsbekken, EIS 19 (Malaise trap), leg. L.O.Hansen & G.Walberg, 19.V.–17.VI.1992. 2♀, at MR.

Finland (7), Germany (2), Hungary (2), Norway (3), Russia (1), Sweden (60), Switzerland (20), United Kingdom (12).

Distribution. Holarctic.

Figures. Tip of metasoma with ovipositor sheaths ♀ (Fig. 15 G), face ♂ (Fig. 27A), face ♀ (Fig. 27B), habitus (Fig. 36 C), male terminal sclerites (Fig. 38 H).