Three new species of Aceria Keifer viz., A. bassiae infesting Bassia latifolia Roxb., A. dasi infesting Diospyros melanoxylon Roxb., and A. randi infesting Randia dumetorum Lamk. are described from West Bengal and Bihar. A. bambusae Channabasavanna, A. croralariae Channabasavanna and A. sorghi Channabasavanna are reported for the first time from north east India. An account of the genus Aceria has also been provided with a key for separating the Indian species.