The effects of fiood od the fecundity and longevity of the adults of hymenopterous parasites vary remarkably, not only between species that are host feeders and those that are not host feeders, but also within these groups. It is known, for example, that the females ofItoplectis conquisitor(Say) develop only few eggs without feeding on body fluids of their host. In the present investigations it is shown that the females ofScambus buolianae(Htg.) are not able to deposit any eggs without first feeding on the tissues of their host. Such information is important for the successful establishment of newly-imported parasites.