A taxonomic listing of 532 species (plus six nomina nuda) of sucking lice (Insecta, Anoplura) described through January 1993 is presented. Listings are arranged alphabetically according to family and genus. For each louse species, the following information is given: 1) author, date, and literature citation for the original description; 2) synonymies, if any; 3) type host mammal species and its taxonomic affiliation; 4) principal host mammal species and their taxonomic affiliations; 5) type locality; 6) known geographical distribution of the louse species; 7) notes pertaining to other key taxonomic, host, or geographical data for the louse species. Two taxonomic changes are made in the checklist as follows: 1) Linognathus setosus bhatii Dutta, 1988, is elevated to species rank as Linognathus bhatii Dutta, 1988; 2) Neohaematopinus baibacinae Blagoveshtchensky, 1965, is reassigned as Linognathoides baibacinae (Blagoveshtchensky, 1965).