Abstract
Japanese species of the genus Eobrachycentrus are revised, and only 2 species are recognized: E. vernalis (Banks 1906) and E. niigatai (Kobayashi 1968). Eobrachycentrus oharensis (Iwata 1927) and E. propinquus Wiggins et al. 1985 are synonymized with E. vernalis and E. niigatai, respectively. Adults and immature stages of these 2 species are described or redescribed. Information on the larval habitat and biology is provided.