Two new species of Cheiroseius Berlese (Acari: Blattisociidae), with a key for identification of the species from Brazil

Cheiroseius Berlese is the second largest genus of the mite family Blattisociidae, but only two species of this genus have been reported from Brazil, C . neophalangioides Mineiro, Lindquist & Moraes and C . tennesseensis (De Leon). The following seven species are recorded for the first time in Brazil, including two new species: C . brevipes Karg, C . luizgonzagai n. sp., C . ornatus (Evans & Hyatt), C . parvipulmonis Karg, C . pugiunculus Karg and C . tuberculatus (Evans & Hyatt) and C . xerophilus n. sp. The new species are here described based on the morphology of adult females. Species of this genus occur commonly in wet habitats, together with different organisms, including mosquito larvae. The species reported in this study were collected from litter, except C . luizgonzagai n. sp., collected from Salvinia sp., a floating plant. A key for the separation of nine species now known from Brazil is provided.