Xestopelta gracillima ( Schmiedeknecht 1926, Promethes

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 114

Xestopelta gracillima ( Schmiedeknecht 1926, Promethes )

Homocidus amabilis Habermehl 1935

Diagnosis. Fore wing length 3.8–4.6 mm. Antenna of both sexes with 16–20 flagellomeres. Propodeum with carinae mostly reduced, sometimes with pleural and traces of lateral carinae, never with apical transverse carina.

Colouration of females. Antenna black or dark brown. Head and mesosoma black, face with yellow along inner orbits, yellow on clypeus, mouthparts, hind corner of pronotum, tegula, subtegular ridge, large shoulder marks with their inner corners elongated over most of mesoscutum ( Fig. 13 D), and upper mesepimeron; scutellum yellow. Legs orange, fore and mid coxae yellow, sometimes with black at extreme base, hind coxa black with a yellow apex, hind and sometimes mid trochanters black-marked; femora orange, black-marked basally; hind tibia and tarsus orange or brown, apex sometimes dark. Metasoma black with yellow triangular marks medially on apex of tergites 3 to 5 or 6.

Colouration of males. As in females but with yellow on ventral surface of antenna, entire face, epicnemium, and a stripe on lower mesosternum. Coxae with yellow colouration often more extensive than in female. Metasoma as in female.

Material examined. Holotype of Homocidus amabilis Habermehl : Italy, Südtirol, Graun im Vinschgau , St. Valentin auf der Heide , 1470m, leg. E. Bauer, 10.VII.1931. 1♀, at ZSM.

Additonal material: Italy: Bolzano, Sarntal 1250m, leg. K.Zwakhals, 26.VI.1976. 1♀, at KZ. Sweden: Södermanland, Tyresö kommun, Ava, Spirudden, mixed coastal oak forest, N59°10.313', E18°22.197', leg. SMTP, 12.V.–28.V.2004, 1♂, 28.V.–16.VI.2004, 1♂, both at NRM. United Kingdom: Hilbre Island, on blackthorn, leg. G.Broad, 21.VII.2001. 1♀, at BMNH. Switzerland: Vaud, L'Abergement , Le Suchet 1350m, 1350m, N46.773, E6.4776, leg. J.de Beaumont, 19.VII.1959. 1♀, at MZL ; Fribourg, Prévondavaux , 690m, N46.729, E6.7911, leg. J.Aubert, 2.VI.1957. 1♀, at MZL ; Vaud, Blonay , Les Pléiades , 1360m, N46.482, E6.9047, leg. D.Petitpierre, 20.VI.1960. 1♀, at MZL ; Vaud, Blonay , Les Pléiades , 1360m, N46.482, E6.9047, leg. J.de Beaumont, 5.VII.1956, 1♀, 13.VI.1960, 1♀, both at MZL. Grisons , S-chanf , 1673m, N46.612, E9.9855, leg. J.de Beaumont, 8.VII.1955. 4♀, at MZL.

Distribution. Palaearctic.

Figures. Clypeus ( Fig. 12 K), mesoscutum ( Fig. 13 D), habitus ( Fig. 36 F), male terminal sclerites ( Fig. 38 J).

Figures

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.

FIGURE 13. A. Diplazon multicolor ♀, metasoma. B. Diplazon pectoratorius ♀, propodeum. C. Tymmophorus obscuripes ♀, propodeum. D. Xestopelta gracillima ♀, mesoscutum showing colour pattern. E. Campocraspedon caudatus ♀, metasoma. F. Campocraspedon caudatus ♂, metasoma. G. Daschia brevitarsis ♀, metasoma. H. Homotropus nigritarsus ♂, antenna. I. Enizemum ornatum ♂, antenna.

FIGURE 12. A. Diplazon laetatorius ♀, mesonotum showing notauli. B. Syrphoctonus tarsatorius ♀, mesonotum. C. Diplazon tetragonus ♀, fore wing. D. Enizemum ornatum ♀, fore wing. E. Promethes sulcator ♀, head. F. Tymmophorus obscuripes ♀, head. G. Diplazon tetragonus ♀, clypeus. H. Tymmophorus suspiciosus ♀, clypeus. I. Daschia brevitarsis ♀, clypeus. J. Campocraspedon caudatus ♀, clypeus. K. Xestopelta gracillima ♀, clypeus. L. Diplazon tetragonus ♀, hind tibia.