Life History and Larva of Allomorpha hirasana (Hymenoptera, Tenthredinidae) Feeding on Symplocos in Japan

Abstract

Based on rearing experiments in central Honshu, Japan, the previously unknown life history of Allomorpha hirasana Takeuchi, 1929, is outlined and the larva is briefly described and illustrated for the first time. This is a univoltine species with adult emergence in late April in rearing conditions. The egg period is 10–14 days and the larval period is about 28 days. The larva is a solitary external leaf feeder. The host plant association with Symplocos may support validity of the genus Allomorpha.