Please refer also to the following link for details on this group:
Roproniidae = Link 1,
Roproniidae. -- There are three rare North American species of Ropronia. The adults are 8-12 mm long and have a laterally flattened, triangular and petiolate abdomen and a more or less complete venation in the front wing. The immature stages are parasitoids of sawflies.
Key references are Townes (1948) Yasumatsu (1956), Hedqvist (1959), Chao (1962), He (1983), Lin (1987), and Madl (1991) described several species from the Palearctic and Oriental regions.
He, J. & X. Chen. 1991. Xiphyropronia gen.nov., a new genus of the Roproniidae (Hymenoptera: Proctotrupoidea) from China. Canadian journal of zoology, 69: 1717-1719. ISSN: 1480-3283 doi: 10.1139/z91-239