In the material collected from wells, hyporheic waters, and springs in western Algeria seven species of watermites have been found. Three of these are new to science: Acherontacarus tuberculalus nov. spec., Neumania (s. str.) algeriensis nov. spec., and the representative of a new genus Neoacherontacarus dividuus nov. gen., nov. spec. The male of Limnesia (s. str.) granulosa Walter, 1931 is discovered and for the first time described.