ABSTRACT Mites of the family Unionicolidae were collected from the freshwater bivalves _Caelatura aegyptiaca_ and _Unio abyssinicus_ (family Unionidae). Two new species of unionicolid mites namely _Unionicola tetrafirrcatus_ and _Unionicola difitrcatus_ were collected and described by means of seaming electron microscopic study , The adults of U. tetrafurcatus were found in the mussels Caelatura aegyptiaca and Unio abyssinicus, while those ... Read more