Micro-caddisflies in the tribe Hydroptilini (Trichoptera: Hydroptilidae: Hydroptilinae) from Malaysia and Brunei

Twenty-two new species of Hydroptilidae in six genera are described from Malaysia and Brunei: Ugandatrichia Mosely (1), Macrostactobia Schmid (1), Hydroptila Dalman (16), Oxyethira Eaton (1), and Hellyethira Neboiss (3). In addition, new distributional records of previously described species of Ugandatrichia (1), Hydroptila (2), Oxyethira (2) and Tricholeiochiton Kloet & Hincks (1) are given, and immatures of Macrostactobia are figured and described for the first time. Species check lists of Hydroptilini are included for West Malaysia, East Malaysia (Sabah, Sarawak) and Brunei.