| abstract | Four new species of mites in the Genus Parasitus, found associated with bumblebees of the Genus Bombus in Alberta, Canada, are described. They are: Parasitus hobbsi; P. favus; P. inquilinobombus; P. perthecatus. For each of these new species the deutonymph, female and male are described and for P. perthecatus the protonymph and larva, also. A fifth species P. fimetorum Berlese, 1903, found in nests of bumblebees of the Genus Bombus in Alberta, Canada, is also briefly discussed. |