Abstract
Observations were made on the tsetse species G. longipennis Corti in Nkruman escarpment, Kenya. The species inhabited relatively open areas of the bushland. The rate of infection with trypanosomes [Trypanosoma vivax and T. congolense] was studied as well as the activity pattern and amenability to trapping. Results of laboratory rearing are given. Trypanosome infection rate was higher in female than in male flies. The method of using a slow moving vehicle resulted in the capture of more old flies than young ones (of both sexes) and more males than females. G. longipennis was not amenable to trapping by any of the 2 mechanical traps used (Moloo''s trap and the biconical trap of Challier and Laveissiere).

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