Probably gregarious external parasitoids of wood-boring
Cerambycidae (Coleoptera). Larvae pupate within the host burrow.
Reference
Finnamore, A.T.
& Brothers, D.J. 1993. Superfamily Chrysidoidea (pp. 130-160). In GOULET, H. &
HUBER, J. (eds). Hymenoptera of the World: an identification guide to
families. Research Branch, Agriculture Canada, Ottawa, Canada, 668 pp.