A new blind species of the genus Sinella Brook, Sinella bui sp. nov., is described from Gutian Mountain, Zhejiang Province, China. It is characterized by eyes absent, labial chaeta R ciliate, 4＋4 central and 6＋6 lateral macrochaetae on the fourth abdominal segment. It is most similar to Sinella christianseni Ma Chen but differs from the latter in ciliate labial chaeta R, pointed tenent hairs, and abdominal chaetotaxy.
