The Mosquitos of the Jebel Auliya Reservoir on the White Nile

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Abstract
The mosquitos of the reservoir area have been studied mainly with the object of planning suitable methods of controlling malaria. This paper is an account of the work done so far.The diversity of conditions in the area, which is of such length that it has been divided into three sections, is described with special reference to the river and reservoir levels, predacious fishes, breeding places of mosquitos and water plants among which mosquitos breed.The mosquito fauna of the area is described and observations on the breeding places and adult habits of the principal species are recorded. The large proportion of “ripe” females among Anophelines dissected is noted.The probable effects of the reservoir conditions on the mosquitos are discussed.Notes are given on certain species, and the relation of A. rufipes and A. pharoensis to malaria are discussed from circumstantial evidence. The former is provisionally regarded as a vector.Control measures are described with particular reference to A. funestus (in the south), A. gambiae and A. rufipes, the latter being a vector of malaria expensive to control in the larval stage. The value of insecticidal dusts in the area is discussed.