Hydrobius is a genus of hydrophilid beetles that contains nine species distributed throughout the Holarctic ecozone. \n* Hydrobius arcticus Kuwert, 1890 \n* Hydrobius convexus Brullé, 1835 \n* Hydrobius fuscipes (Linnaeus, 1758) \n* Hydrobius melaenus (Germar, 1824) \n* Hydrobius orientalis Jia & Short, 2009 \n* Hydrobius pauper Sharp, 1884 \n* Hydrobius pui Jia, 1995 \n* Hydrobius punctistriatus Jia, 1995 \n* Hydrobius tumidus LeConte, 1835