The first microcaddisflies Metrichia Ross, 1938 recorded in Tocantins State, northern Brazil (Trichoptera: Hydroptilidae): Metrichia elongata sp. nov. and Metrichia vulgaris Santos, Takiya & Nessimian 2016.

The microcaddisfly Neotropical genus Metrichia Ross, is recorded for the first time from the state of Tocantins, northern Brazil, through the discovery of two species: Metrichia elongata sp. nov. and Metrichia vulgaris Santos, Takiya & Nessimian 2016. Herein, the new species is described and illustrated based on males collected in a protected and preserved area in Cerrado biome of Tocantins. Metrichia elongata sp. nov. can be recognized mainly by the type and position of setae on the inferior appendages and morphology of the dorsolateral hook. The discovery of these species increases the number of Metrichia species in the Brazilian Cerrado from seven to eight and are only the eleventh and twelfth caddisfly species reported for Tocantins State.

Novelties in central Amazonian microcaddisflies: Three new species of Ochrotrichia Mosely (Trichoptera: Hydroptilidae).

Ochrotrichia Mosely is the most species-rich group of microcaddisflies in the Neotropical Region. However, knowledge about this genus in Brazil is still limited; only 11 species are known, distributed in the Atlantic Forest (9), Caatinga (3), and Amazon (1) biomes. In this paper, three new species of Ochrotrichia are described and illustrated based on adult males collected in the Ducke Forest Reserve, a protected area administered by the Instituto Nacional de Pesquisas da Amazonia (INPA), located in central Amazonia, Brazil. Ochrotrichia belodes sp. nov., O. buenosoria sp. nov. and O. ducke sp. nov. can be recognized mainly by the morphology of tergum X and the inferior appendages. Based on their simple, elongate tergum X, all new species are assigned to the Ochrotrichia xena Group.