A new predatory mite species, Proprioseiulus ceylonensis sp. nov. (Acari: Phytoseiidae) is described and illustrated based on female and male specimens collected from soil-litter in Sri Lanka. The new species can be easily distinguished from all other known species in the genus by the combination of the following characters: absence of ventral setae ZV3, presence of ten macrosetae on legs and saccular calyx of spermatheca. Moreover, an identification key to the world species of the genus is presented.
Key words: Amblyseiinae, taxonomy, morphology, Indomalayan realm, predatory mites