Based primarily on colleçtions of FITTKAU and MARLIER, adults of the Amazonian species in four families of Trichoptera are described and figured. Keys are provided to the Latin American families (except those exclusively Chilean), potentially Amazonian genera, and described species. Fifty-five species (of which 52 are described as new) are placed in the genera: Atopsyche (1 species), Antoptila (1 species), Protoptila (10 species), Wormaldia (1 species), Dolophilodes (1 species), Chimarra (8 species), Polyplectropus (4 species), Nyctiophylar (1 species), Cyrnellus (7 species), and Cernotína (21 species)