Genus Buathra Cameron, 1903

Buathra Cameron, 1903a: 233 . Type species: Buathra rufiventris Cameron, 1903 . Monobasic.

Bathycrisis Cameron, 1905: 96 . Type species: Bathycrisis striaticollis Cameron, 1905 (= Cryptus excavatus Cameron, 1905). Monobasic.

In Japan, only one species, B. laborator (Thunberg, 1822), has been recorded. I herein describe a new species, B. nipponica sp. nov. based on specimens from Honshu, Japan.