Lathrolestes ensator, a parasitoid of the apple sawfly.

Summary The present lnowledge on dre ichneumonid wasp lathrolestes ensator (Brauns) is summarized. The species parasitizes larvae of the sawfly Hoplocampa testudinea (Klug). At higher parasitism levels superparasitism occus. The black, comma-shaped parasitoid eggs hatch after the host larva has spun its cocoon in soil. From September until the following spring, only theL. ensator prepupa, having killed its host, is found in dte cocoon, gradually developing into an adult which emerges in May/June. Some prepupae have a prolonged diapause and emerge after 2 winters.