Revision of the genus Cephalobyrrhus of Japan and Taiwan (Coleoptera, Limnichidae)

Japanese and Taiwanese species of the genus Cephalobyrrhus are revised. A new species, C.amami sp. n., is described from Amami-Ôshima, the Ryukyus, Japan. This species is clearly distinguished from the other known species by the short and pointed median lobe and long phallobase. Two previously known species from Japan and Taiwan, C.latus and C.japonicus, are redescribed.