Observations on Anopheles gambiae and other mosquitoes at Wadi Halfa

Summary Owing to the position of Wadi Halfa on the Nile route, the control of A. gambiae is important to prevent it from travelling northward. Conditions affecting this and other species are described at some length because the Aswan Dam may be raised and produce further problems. The mosquito fauna is discussed in relation to the zoogeographical position of the area. Notes on each species and on seasonal changes in distribution of A. gambiae are given. It is probable that this species has occurred at Wadi Halfa for many years and that it winters in the Second Cataract. Methods of control, particularly of A. gambiae , are described, with special reference to the possible effect of the prevailing wind.