Woldstedtius biguttatus ( Gravenhorst 1829, Bassus

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 110

Woldstedtius biguttatus ( Gravenhorst 1829, Bassus )

Bassus rufipes Gravenhorst 1829 (homonym)

Bassus confusus Woldstedt 1874

Diagnosis. Fore wing length 3.7–4.5 mm. Antenna of both sexes with 22–23 flagellomeres. Face broadened, not conspicuously widened ventrally. Mesopleuron finely and evenly coriaceous. Propodeum devoid of carinae, evenly coriaceous also on petiolar area.

Colouration of females. Antenna black or brown. Head and mesosoma black, face including clypeus black, yellow on mouthparts, hind corner of pronotum, tegula, sometimes subtegular ridge, and upper mesepimeron; without yellow shoulder marks, scutellum at most with a small yellow apical spot. Legs including all coxae orange, fore coxa often dark, at least basally; femora orange, hind femur often with a dark apex; hind tibia black with a white base, hind tarsus dark. Metasoma black.

Colouration of males. As in females but with yellow ventrally on antenna, entire face, propleuron, and small yellow shoulder mark; yellow colouration on mesopleuron restricted to area in front of epicnemial carina and sometimes a yellow spot in front of hind coxa. Fore and mid coxa often entirely yellow, hind coxa black or orange with a yellow apex. Metasoma black with yellow spots basally on tergites 3 and often 4.

Material examined. Austria (1), Finland (2), Germany (1), Hungary (30), Netherlands (1), Russia (2), Sweden (90), Switzerland (20), United Kingdom (2).

Distribution. Palaearctic.

Figures. Face ♀ ( Fig. 27C ), habitus ( Fig. 36 B).

Figures

FIGURE 27. Faces of the more common Woldstedtius species. A. Woldstedtius citropectoralis ♂. B. Woldstedtius citropectoralis ♀. C. Woldstedtius biguttatus ♀. D. Woldstedtius flavolineatus ♀. Scale bars represent 500 µm.

FIGURE 36. Habitus of Diplazontinae species. A. Woldstedtius bauri sp. nov. B. Woldstedtius biguttatus. C. Woldstedtius citropectoralis. D. Woldstedtius holarcticus. E. Woldstedtius patei. F. Xestopelta gracillima.