Three new Oxyethira Eaton 1873 (Trichoptera: Hydroptilidae) from Par State, Northern Brazil.

Three new species of Oxyethira are described and ilustrated: Oxyethira longisterna sp. nov., Oxyethira gyrosterna sp. nov., and Oxyethira acuminata sp. nov. New country records of Oxyethira macrosterna Flint 1974 and Oxyethira bicornuta Kelley 1983 are also provided.

The genus Neotrichia Morton 1905 (Trichoptera: Hydroptilidae) in Par state, Northern Brazil: New species and an unpublished species made available.

Five new species of Neotrichia Morton 1905 from Brazil are described, including Neotrichia dirrocha sp. nov., N. jamevu sp. nov., N. paidegua sp. nov., N. pavula sp. nov., and N. flinti Keth sp. nov. Among these, N. flinti Keth sp. nov., a species described by Keth (2002) from Venezuela but not previously published, is made available. Illustrations of male genitalia are provided with each description.