A new species of the genus Coelotes from the Yaeyama Islands of Okinawa Prefecture is described under the name of Coelotes yaeyamensis. The present species resembles Coelotes insidiosus L. KOCH, 1878 known from Japan (from Kyushu to Hokkaido) and Korea, but the former is distinguished from the latter by the shapes of the embolic conductor of the male palp and the internal genitalia of the female.
