On the oviposition habitat of Epiophlebia superstes (Selys) (Anisozygoptera: Epiophlebiidae)

Oviposition site selection in , E. superstes was investigated at a mountain stream in Japan. The dragonfly selected, at the stream, nearly always the liverwort Conocephalum conicum as the host plant for oviposition, which grew close to the stream in shaded environment. The trace of oviposition was detected only in healthy thalli, and a high egg density was observed in thalli of a rather small-sized colony of the liverwort. The significance of these observations is discussed in relation to larval development.