A new species of Hemicaecilius Enderlein is here described and illustrated. It is based on a male collected near Machu Picchu, Peru, that constitutes the third specimen and the first male known in the genus. Its morphology confirms the closeness with Nadleria Badonnel & García Aldrete, that had been established on basis of female characters. The holotype is deposited in the National Insect Collection, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City (coden CNIN).

Una nueva especie de Hemicaecilius Enderlein es aquí descrita e ilustrada. Está basada en un macho colectado cerca de Machu Picchu, Perú, que constituye el tercer ejemplar y el primer macho que se conoce en el género. Su morfología confirma la cercanía con Nadleria Badonnel & García Aldrete, que había sido inferida con base en caracteres de la hembra. El holotipo está depositado en la Colección Nacional de Insectos, Instituto de Biología, Universidad Nacional Autónoma de México, México, D. F. (Coden CNIN).

Waoraniella vidali n. sp., the second species in the genus, is described and illustrated on the basis of a male from Amazonas, Brazil. The hypandrium and clunium are autapomorphic for the family. The phallosome is similar to that of Eolachesilla, and the character state "Forewing Rs-M joined by a crossvein" is found to appear in three genera of the subfamily Lachesillinae. Thus Waoraniella and Eolachesilla are close, and the genera of Graphocaeciliini stand apart in the subfamily.

Se describe aquí Waoraniella vidali n. sp., la segunda especie en el género, con base en un macho colectado en Amazonas, Brasil. El hipandrio y el clunio son autapomórficos para la familia, mientras que el falosoma es similar al de Eolachesilla; el estado de carácter "Venas Rs-M del ala anterior unidas por una vena transversal", se encuentra en tres géneros de la subfamilia Lachesillinae. Waoraniella y Eolachesilla son cercanas, y los géneros de la tribu Graphocaeciliini constituyen un grupo aparte en la subfamilia.

O gênero novo Amazolachesilla, do estado do Amazonas, Brasil, é descrito e ilustrado. Pertence à Graphocaeciliini (Lachesillidae: Eolachesillinae). Possui uma projeção clunial média e projeções laterais autapomórficas, bem como machos com um epiprocto peculiar e paraprocto com uma haste longitudinal esclerosada, únicos dentro da tribo.

Amazolachesilla, a new genus in Graphocaeciliini (Lachesillidae: Eolachesillinae), from Amazonas, Brazil, is here described and illustrated. It presents an autapomorphic clunial shelf and clunial projections, as well as a peculiar male epiproct, and paraprocts with a s clerotized longitudinal rod that makes it unique in the tribe.

The species of Psocoptera currently known for Brazil are listed, with state distribution and biogeographic status. The categories of geographic distribution are discussed, as well as some of the evidence indicating that the present size of the Brazilian fauna is underestimated.

Se listan las especies de Psocoptera actualmente registradas en Brasil, incluyendo la distribución por estado y su categoría biogeográfica. Se presenta alguna de la evidencia que hace suponer que el tamaño actual de la fauna de Psocoptera de Brasil está subestimada.

103 espécies de Psocoptera são registradas na Estação Ecológica do, Maracá e paca-roma, Estado de Roraima, Brasil. Sessenta e duas espécies novas são descritas e figuradas nos seguintes gêneros: Echmepteryx(2), Tapinella.(3), Musapspcus (1), Seopsocus(3), lsthmopsocus(3), Dolabellopsocus(6), Epipsocus(5), Neurostigna.(1), Notiopsocus (1), Caecilius(6), Enderleinella(1), Polypsocus (3), Scytopsocus(1), Archipsocus(7), Lochesilla(4), Notolachesilla(7), Peripsocus(4), Dactylopsocus(7), Metylophorus(3), Blaste (4), Lichenomima(3), Myopscus (3). O gênero Monocladellus,gen. n. écriado para Archipsocus macrurus New e uma espécies nova. O gênero MonocladellusEnder-lein é sinonimizado com PolypscusHagen. As espécies sul americanas transferidas ao gênero LophopterygellaEnderlein por. New (1 979) são retransferidas ao gênero Myopsocuse representam uma Linhagem paralela neste gênero.

Psocoptera. from Ilha de Marcica and Pacaraima, Roraima State, Brazil, representing 103 species are recorded. Sixty-two are new to science. and are described and figured, representing genera Echmepteryx(2), Tapinella(3), Musapsocus, (1), Seopsocus(3),Isth-mopsocis(3), Dolabellopsocus(6), Epipsocus(5), Neurostigma.(1), Nctiopscus(1), Cae-cilius (6) , Enderluinella (1), Xanthocarcilius(1) , Polypsocus(3) , Scytopsocus(1), ar-chipsocus(1), Lachesilla(4), Notolachesilla(1) , Perispsocus(4), Dactylopsocus (1) , Metylophorus(3), Blaste.(4), Lichenomiae(3), Myopsocus (3). Genus Notarchispsu. gen. is erected for Archipsocus macrurusNew and a new species. Genus MonocladellusEu-derlein in placed in synonymy of, PolypsocusHagen. South American species assigned to genus LophopterygllaEnderlein by New (1979) are. reassigned to Myopscus and represent a parallel development in the latter genus.