Abstract
The population of the Makonde plateau, Newala district, Tanganyika, underwent a severe epidemic of a virus disease in 1952–55, and during an investigation of the epidemic the opportunity was taken to define the biting activity cycle of Aëdes (Stegomyia) aegypti (L.), a mosquito that was extremely common in native huts on the plateau.Continuous baited catches, lasting for 49 hours, were made by teams of four native catchers, inside a hut and on its verandah. The intensity of attack is expressed as the geometric-mean numbers of A. aegypti alighting on such a team per hour. The catches are recorded on a 24-hour system in which sunset is near to 1800 hr.
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