Olesicampe heterogaster (Thomson, 1887)

Verheyde, Fons, Hoekstra, Paul, Libert, Pierre-Nicolas, Meijer, Hilco, Ketelaere, Augustijn De, Vandaudenard, Thibaud, Belgers, Dick & Brosens, Edwin, 1880, Two hundred and five ichneumonid wasps reported for the first time in Belgium and the Netherlands (Hymenoptera: Ichneumonidae), Belgian Journal of Entomology 122, pp. 1-142 : 45

Olesicampe heterogaster (Thomson, 1887)

= syn. Holocremna heterogaster Thomson, 1887 , synonymized by FITTON (1982: 41)

This species used to belong to the genus Holocremna , which was synonymised with Olesicampe but can still be seen as a subgenus. The species from this subgenus have a different head shape (shorter, not cubiform as in Fig. 16), their clypeus is rounded apically and its teeth-length is more or less equal. On average the species are also slightly smaller.

Olesicampe heterogaster is more difficult to key. Its femora, mandibles and tegulae are not completely black, the temples are seldomly narrowed behind the head and its speculum is matt. The coxae and trochanters are black, except for the hind legs of the males. Known hosts are Acantholyda erythrocephala (Linnaeus, 1758) (Symphyta: Pamphiliidae ) and Diprion pini (Linnaeus, 1758) (Symphyta: Diprionidae ) ( SCHEIDTER, 1934; ZAPRYNANOV, 1985).

First report for the Netherlands; unreported in Belgium.

MATERIAL EXAMINED:

THE NETHERLANDS: • 1 ♀; Drachten-Azeven (FR); 53°06’48”N 6°09’01”E; 30/viii/2020; H. Meijer leg.; coll. HM; field observation; H. Meijer det. • 1 ♀; Drachten-Azeven (FR); 53°14’53”N 6°04’55”E; 6/ix/2020; H. Meijer leg.; coll. HM; field observation; H. Meijer det.