The Primary Larvae of Three Ophionine Ichneumonids, Parasitic On Rhyacionia buoliana

In a previous paper concerning the numerous species of insect parasites associated with the Pine Shoot Moth, Rhyacionia buoliana Schiff., the mature larvae of the more important Hymenoptera were described in detail, special attention being paid to the mouth parts and tentorial structures which were found, in many cases, to provide valuable characters for distinguishing the species.