Abstract The described species of Psocoptera currently known for Brazil are listed, with state distribution and biogeographic status. An identification key to the families recorded in Brazil is presented.

Abstract The unknown female of Euplocania quinquedivisa Silva-Neto, García Aldrete & Rafael, is described and illustrated. Information on sexes known and distribution in Brazilian states is included for the known species of Brazilian Euplocania.

Abstract A catalogue of type specimens of Psocoptera (Insecta: Psocodea) deposited in the collection of the Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil, is presented and updated to February, 2019. 45 holotypes and 47 paratypes of 52 species were found, included in the suborders Psocomorpha and Trogiomorpha, and listed in the families Amphipsocidae, Asiopsocidae, Caeciliusidae (infraorder Caeciliusetae); Lachesillidae and Pseudocaeciliidae (infraorder Homilopsocidea); Philotarsidae (infraorder Philotarsetaea) Hemipsocidae, Myopsocidae and Psocidae (infraorder Psocetae); Ptiloneuridae (infraorder Epipsocetae), and Lepidopsocidae (infraorder Atropetae). The taxa are presented alphabetically by suborders, infraorders, families, subfamilies, tribes and genera, followed by species (updated to the valid name), bibliographic citation, type category, description of the type condition with collection number and method of preservation. When necessary, comments are added.

Abstract Loneuroides is registered for the first time in Brazil. A new species from the Brazilian state of Bahia, is here described and illustrated. It differs from all the other species in the genus in details of the female ninth sternum and by number of primary branches in vein M of fore- and hind- wings. A map with the distribution of the species of Loneuroides is included.

Abstract Triplocania umbrataoides sp. nov., from the Río Tambopata Reserved Zone, in Madre de Dios, Peru, is here described and illustrated. Triplocania magnifica Roesler and the male of Triplocania spinosa Mockford are redescribed and illustrated. The female Triplocania spinosa is here described and illustrated. The original combination of Belicania cervantesi (García Aldrete) is revalidated.