The family Parasitidae comprises two subfamilies, Parasitinae and Pergamasinae. A generic concept of this family is not stable and requires a revision. The number of genera varies depending on authors and their view on the systematics of the family, especially on the rank of taxa. We recognize 23 genera within Parasitinae and 22 genera within Pergamasinae, 4 of them are subdivided into subgenera. A dichotomous key for separation of genera and subgenera is provided. A new genus, Coprocarpais n. g. with type species Parasitus copridis Costa, 1963 is proposed and a diagnosis is given. The genus Erithosoma is not assigned to any subfamily because a description of females is missing. The most pressing taxonomic problems at generic and subgeneric levels are discussed. Fourteen new combinations are proposed.

Two species of Parasitidae, Parasitus americanus (Berlese, 1905) and Cornigamasus ocliferius Skorupski & Witaliński, 1997 were found for the first time in Slovakia. Parasitus americanus is a cosmopolitan species, which was found in several cemeteries and in a botanic garden in Bratislava. Almost all records of C. ocliferius are from Poland except for one record from Egypt. Cornigamasus ocliferius was found in decomposed plant material in Western and Central Slovakia and in bird nests in Western and Eastern Slovakia; part of the material was previously published as Cornigamasus lunaris (Berlese, 1882) and is revised here.

The originally monotypic genus Anadenosternum Athias-Henriot, 1980 is revised and redefined. A new species Anadenosternum okalii sp. nov. is described and illustrated based on adult specimens collected in park litter in Bergamo, Italy. The type species of the genus, Anadenosternum azaleense (Daele, 1975), is redescribed and illustrated from adults and deutonymphs collected in soil detritus of greenhouses in the Botanic Garden in Bratislava, Slovakia. Anadenosternum pediculosum Karg & Glockemann, 1995 is considered to be a junior synonym of A. azaleense. The genus Anadenosternum is recorded from Italy and Slovakia for the first time. An identification key to known species of the genus is provided.