Woldstedtius flavolineatus (Gravenhorst 1829, Bassus) Bassus bimaculatus Holmgren 1858 Bassus interruptus Holmgren 1858 Bassus agilis Cresson 1868 Bassus frontalis Cresson 1868 (homonym) Mesoleius junctus Provancher 1883 Diagnosis. Fore wing length 4.3–6.3 mm. Antenna in females with 22–24, in males with 23–25 flagellomeres. Face not broadened, not conspicuously widened ventrally. Mesopleuron finely and evenly coriaceous. Propodeum mostly devoid of carinae but often with vestiges of petiolar carinae present apically, evenly coriaceous also on petiolar area. Colouration of females. Antenna black. Head and mesosoma black, face usually with a large yellow face patch which often covers a large part of or entire central elevated area, clypeus black, yellow on mouthparts, hind corner of pronotum, tegula, sometimes subtegular ridge, with small to large shoulder marks, and upper mesepimeron; scutellum at most with a small yellow apical spot. Legs including coxae orange, fore coxa often dark basally; femora orange, hind femur sometimes 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, epicnemium, mesosternum and most of lower mesopleuron. Coxae mainly yellow, hind coxa usually marked with orange or black. Metasoma black with yellow spots or bands basally on tergites 3 and sometimes 4. Material examined. Lectotype of Bassus bimaculatus Holmgren: Sweden, Småland, leg. Boheman. 1♂, at NRM (hereby designated). Lectotype of Bassus interruptus Holmgren: Sweden, Småland, leg. Boheman. 1♂, at NRM (hereby designated). Finland (2), Hungary (15), Russia (2), Sweden (24), Switzerland (7), United Kingdom (5). Distribution. Holarctic, Oriental, Oceanic, and Neotropical.

Published as part of Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), pp. 1-143 in Zootaxa 3801 (1) on page 111, DOI: 10.11646/zootaxa.3801.1.1, http://zenodo.org/record/249944