Über Eudorylas subterminalis Coll. (Dipt., Pipunculidae) als parasit bei Cicadellidae (Homoptera) in Berlin (West) [Studies on Eudorylas subterminalis (Diptera, Pipunculidae) parasitizing some Cicadellidae (Homoptera) in Berlin (West)]

The host-seeking and oviposition behaviour and the host-specificity of a pipunculid parasite of cicadellids, Eudorylas subterminalis, was studied in West Berlin. Visual stimuli appeared to be the most important factors in the location of a host by the ovipositing females, and only the 2nd-, 3rd- and 4th-instar nymphs were selected. The parasite egg was inserted into the host haemocoel between the 4th and 5th tergites. E. subterminalis was not host-specific and attacked any member of the family Cicadellidae (including Euscelidae). The pipunculid species so far recorded from West Berlin by various authors (3 species of Eudorylas, 3 of Pipunculus and 1 of Tomosvaryella) are listed together with their 20 host species, of which some were of economic importance; E. subterminalis and T. sylvatica had the widest host range.Abstract 2: During a stay at Berlin (West) in 1977/80 studies were conducted on the host-searching, oviposition and host-specificity of Eudorylas subterminalis, a parasitic fly species of Pipunculidae. The visual orientation of the female fly plays undoubtedly a dominant role in searching the host. The female fly usually selects for oviposition only second, third and fourth instar nymphs of the cicadellid hosts. The first instar nymph is rarely attacked, while fifth instar is not accepted at all. The female oviposits within the haemocoel between fourth and fifth tergital region of the host. The fly is unspecific and attacks species of leafhoppers belonging to the family Cicadellidae. The records of Pipunculidae and their hosts in Berlin (West) have also been stated.