Dus volgende keer eentje vangen en zien of er iemand met de juiste literatuur deze een naam kan geven.
Heb ook geen idee hoe deze het beste in te voeren op .be

Nog iets gevonden over dit soort wespje.
Megaspilidae
Alekseev (1978/1987), as translated from the Russian, noted that "Antennae in both sexes with equal number of segments. Depression above antennal sockets developed or absent. Subcostal vein before pterostigma often thickens and forms prostigma. Mesonotum in anterior part along sides sometimes with two parallel grooves extending from median groove. Abdominal petiole masked by "neck" and not visible unless abdomen removed. Abdomen relatively compressed dorsoventrally. male genitalia with volsellar plates distinctly demarcated from parameres." There were 7 species reported in Europe.
Masner (1993) noted that the body of members of this family is usually 2-3 mm long (rarely 4 mm); they are black or yellow; macropterous, brachypterous or apterous. The forewing has a large stigma (except in males of Lagynodinae). Antennae have 9 flagellar segments in both sexes. The metasoma has a neck-like, constricted, anterior margin of the largest tergum (true tergum 2 = apparent tergum 1).
Not much is known about their hosts and habits, but some members are primary parasitoids of Coccoidea (Homoptera), Neuroptera and puparia of Diptera, or they are hyperparasitoids of Aphididae (Homoptera) through Aphidiinae (Braconidae). One California species parasitizes Mecoptera (Boreidae). Two subfamilies are Megaspilinae and Lagynodinae. The former is cosmopolitan and comprises 12 genera; the latter comprises 2 genera with the sexes usually being extremely dimorphic. There are circa 450 described species worldwide (circa 1,000 are estimated)
Op Bugguide kwam ik deze fotos nog tegen:
http://bugguide.net/node/view/340858