The Distribution of Tsetse-flies in Tanganyika Territory

Abstract

1. Details are given of the distribution of the eight species of tsetse occurring in the Tanganyika Territory (G. brevipalpis, G. longipennis, G. fuscipleuris, G. palpalis, G. morsitans, G. swynnertoni, G. pallidipes, and G. austeni).2. The effect of past climatic changes on the present distribution of some of the species is discussed in a somewhat speculative manner.3. The detailed information is summarised in a general description and map of the fly-belts of the Territory.4. The effect of certain broad vegetation types and major topographical features on the distribution of species of tsetse in Tanganyika are discussed.5. The effect of the major topographical features in limiting the distribution of the fly is always found to reside in some accompanying vegetative or climatic feature.6. Possible and likely extensions of the fly-belts are briefly indicated ; if these should take place, but little of Tanganyika Territory would remain uninfested by tsetse-fly. The possibility of natural retreat of fly-belts is also discussed.7. A few details are given of the habits and habitats of some of the lesser known species (G. longipennis, G. fuscipleuris and G. austeni).