ABSTRACT Sixteen species of the microcaddisfly Ochrotrichia Mosely, 1934 (Hydroptilidae) have been recorded so far in Brazil, mainly distributed in the Atlantic Forest of southeastern Brazil. In order to reduce the Linnean and Wallacean shortfalls for the Ochrotrichia Brazilian fauna, we diagnose, describe, and illustrate three new species based on adult males from three protected and preserved areas of the Cerrado biome of Federal District (Central-West region), Minas Gerais (Southeast region) and Tocantins (North region) states; all of them named in honor of three great Brazilian entomologists viz., Ochrotrichia froehlichi sp. nov., Ochrotrichia machadoi sp. nov. and Ochrotrichia nessimiani sp. nov. They can be recognized mainly by the morphology of the tergum X, number, and position of the spine-like setae of the inferior appendages. This contribution represents the first record of Ochrotrichia for the Central-West region, increasing the number of species of this genus in Cerrado biome from one to four, and is the first report of a microcaddisfly for the Federal District. In addition, the genus is reported for the first time from Paraná, São Francisco, and Tocantins hydrographic basins. Finally, we provide a checklist of the Ochrotrichia species from Brazil.

ABSTRACT Five new species of Alisotrichia Flint, 1964 microcaddisflies are described and illustrated from type material collected in Northeastern Brazil, constituting the first records of the genus to this region, as it was previously known only from Southeastern and Northern Brazil. The number of Brazilian species of Alisotrichia is doubled herein from five to ten, however, likely there are still many other species to be described. The new species described here are all placed in the orophila species group: A. froehlichi sp. nov. (Sergipe State), A. calori sp. nov. (Bahia and Paraíba states), A. penispinata sp. nov. (Ceará and Pernambuco states), A. dilatata sp. nov. (Ceará and Mato Grosso do Sul states), and A. nordestina sp. nov. (Ceará and Sergipe states). These new species are separated mainly by features of male genitalia, particularly the dorsal area of segment X, the shape of the segment VIII, and the phallus morphology. Currently, the orophila species group is composed by 37 species, more than half of the species diversity of Alisotrichia.