Abstract
The Japanese members of Haliplidae were reviewed and 13 species in two genera are recognized. A new species, Haliplusmoriisp. nov. is described from Honshu; it is similar to Haliplusjaponicus Sharp, 1873, but belongs to a different subgenus. Haliplusdiruptus J. Balfour-Browne, 1946, syn. nov. is treated as a junior synonym of Halipluskotoshonis Kano & Kamiya, 1931. The records of Haliplusdavidi Vondel, 1991 from Japan are regarded as misidentifications of H.kotoshonis. Haliplusbasinotatuslatiusculus Nakane, 1985, syn. nov. is treated as a junior synonym of H.basinotatus. Haliplusangustifrons Régimbart, 1892 known from south and southeast Asia, is newly recorded from Japan.