Reprinted from the East African Wildlife Journal, Vol. I—August, 1963

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The location and topography of Ngorongoro is well known to most readers of this note but, for the information of those who do not know it, Ngorongoro is one of the largest volcanic calderas in the world, lying about 100 miles north-cast of Arusha in northern Tanganyika. The floor of this great crater covers an area of about 100 square miles and consists largely of open grassland lying at about 5,700 feet above sea level. It is surrounded by an unbroken circular precipitous wall of an average height of 7,500—7,800 feet above sea level. Inside the crater there is also a small forest of Acacia xanthopliloea, a salt lake about three square miles in extent which sometimes dries up, and three permanent springs. The combination of these factors has provided a habitat for one of the most spectacular concentrations of wild life to be found in the world today. Ngorongoro crater has been a traditional grazing ground and watering place for the Masai for several generations. Between April and June 1962 a severe outbreak of biting flies occurred in the crater which were reported by the Masai to be pestering human beings, cattle and wild life alike. In order to discover if it was possible to control this scourge, Mr. K. S. Hocking, Director of the Tropical Pesticides Research Institute at Arusha, kindly agreed to investigate the situation and submitted the following report
Available in Print form, East Africana Collection, Dr Wilbert Chagula Library, ( EAF FOS F35)
Masai (African people), Ngorongoro conservation area (Tanzania), stomoxys plague
Fosbrooke, Henry A. (1963) Reprinted from the East African Wildlife Journal, Vol. I—August, 1963