Published online by Cambridge University Press: 01 February 2009
Helicopsyche annae sp.n., H. barbata sp.n., H. bifida sp.n., H. jacquemarti sp.n., H. pedunculata sp.n., H. stoltzei sp.n., H. tanzanica sp.n., H. ulugurensis sp.n. and H. usambarensis sp.n. (Trichoptera : Helicopsychidae) are described.All the new species inhabit mountainous areas in eastern Tanzania. Helicopsyche marlieri Jacquemart, 1957 fromeastern Zaïre is redescribed. A key to the species known from East Africa is provided. Distributional and ecologicaldata are discussed and briefly analyzed.