The generic revision of the family Phytoseiidae that is here presented is conservative, intended to emphasize relationships rather than small differences among natural groups of species. Divergent species are discussed, and a number of generic transfers are made. Six broad genera are recognized that may form the basis for tribes: Typhlodromus Scheuten, Phytoseius Ribaga, Chantia, n. gen., Amblyseius Berlese, Macroseius Chant, Denmark, and Baker, and Iphiseius Berlese. New subgenera are Phytoseius (Pennaseius), Amblyseius (Pennaseius), and Iphiseius (Trochoseius).
