Observations were made on the tsetse species Glossina longipennis Corti in Nkruman escarpment, Kenya. The species inhabited relatively open areas of the bushland. The rate of infection with trypanosomes 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 flies than in male ones. 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 two mechanical traps used (Moloo's trap, and the biconical trap of Challier and Laveissiere).
