Woldstedtius holarcticus ( Diller 1969, Syrphoctonus

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 112

Woldstedtius holarcticus ( Diller 1969, Syrphoctonus )

Diagnosis. Fore wing length 4.3–5.5 mm. Antenna of both sexes with 23–25 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. Head and mesosoma black, face with a large yellow central patch which almost covers elevated central area, clypeus black, yellow on mouthparts, hind corner of pronotum, tegula, subtegular ridge, large shoulder mark, and upper mesepimeron; scutellum often with a small yellow apical spot. Legs orange, fore coxa black with a yellow apex, mid coxa black with apex and a stripe on dorsal side yellow, hind coxa black; 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 on ventral surface of antenna, entire face, propleuron, epicnemium, mesosternum and most of lower mesopleuron. Coxae mainly yellow, hind coxa usually marked with black. Metasoma black with yellow spots or bands basally on tergites 3, 4 and 5, sometimes also on tergite 2.

Material examined. New for Sweden: Västernorrland, Ömsköldsviks kommun, Skuleskogen, Langra, Brook ravine in mixed forest, N63°05.323', E18°29.903', leg. SMTP, 25.VII.–9.VIII.2004. 1♀, at NRM . New for United Kingdom: Hants. Romsey, Awbridge, leg. C.Vardy, VIII.1981. 1♀, at BMNH.

Finland (6), Hungary (1), Sweden (30), Switzerland (40), United Kingdom (1).

Distribution. Holarctic and Oriental.

Figures. Metasoma ♀ ( Fig. 7 D), face ♀ ( Fig. 7 F), habitus ( Fig. 36 D), male terminal sclerites ( Fig. 38 I).

Figures

FIGURE 7. Macro- and microsculpture of diplazontine metasomas and faces. A – D: tergites 1 – 3 of the metasoma. A. Diplazon scutatorius, smooth and shining between the strong and dense punctures. B. Diplazon tetragonus, with partly rugulous sculputure basally on tergite 2, and coriaceous sculpture on tergite 3, both tergites bearing weak punctures on a smooth background behind the strong transverse impressions. C. Tymmophorus obscuripes, with rugose sculpture on tergites 1 and 2, becoming more coriaceous on tergite 3. D. Woldstedtius holarcticus, with coriaceous tergites and striae basally on tergite 2. E – H: faces showing sculpture and shape of clypeus. E. Sussaba flavipes, with a face that is coriaceous only on the middle elevation. F. Woldstedtius holarcticus. G. Diplazon scutatorius. H. Homotropus signatus. F. – H. all with strongly coriaceous and matt sculpture. 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.

FIGURE 38. Ninth sternite and ninth and tenth tergites of male Diplazontinae species. A. Sussaba erigator. B. Sussaba pulchella. C. Sussaba roberti. D. Syrphophilus asperatus. E. Tymmophorus erythrozonus. F. Tymmophorus obscuripes. G. Woldstedtius bauri. H. Woldstedtius citropectoralis. I. Woldstedtius holarcticus. J. Xestopelta gracillima.