Three new species of Oocyclus Sharp, 1882, with additional records from China (Coleoptera, Hydrophilidae, Laccobiini)

Three new species of the water scavenger beetle genus Oocyclus Sharp, 1882 from China (Oocyclus extensus sp. nov., from Xizang, O. latiorificialis sp. nov. and O. ximaensis sp. nov. from Yunnan) are described and illustrated in detail. Additional faunistic data, illustrations of habitus and male genitalia, and a key to Chinese species are provided.