Hygrotus is a genus of beetle in family Dytiscidae. It contains two subgenera (Coelambus and Hygrotus) and about 70 species, including: \n* Hygrotus acaroides (LeConte, 1855) \n* Hygrotus aequalis Falkenström, 1932 \n* Hygrotus ahmeti Hájek, Fery & Erman, 2005 \n* Hygrotus armeniacus (Zaitzev, 1927) \n* Hygrotus artus (Fall, 1919) \n* Hygrotus berneri Young & Wolfe, 1984 \n* Hygrotus bruesi (Fall, 1928) \n* Hygrotus caspius (Wehncke, 1875) \n* Hygrotus chinensis (Sharp, 1882) \n* Hygrotus collatus (Fall, 1919) \n* Hygrotus compar (Fall, 1919) \n* Hygrotus confluens (Fabricius, 1787) \n* Hygrotus corpulentus (Schaum, 1864) \n* Hygrotus cribrarius (Scudder, 1900) \n* Hygrotus curvilobus Fery, Sadeghi & Hosseinie, 2005 \n* Hygrotus curvipes (Leech, 1938) \n* Hygrotus decoratus (Gyllenhal, 181