CHAPTER IX. Notes on the Tse-Tse Fly

NOTES ON THE TSE-TSE FLY

Connection between buffaloes and tse-tse flies--Sir Alfred Sharpe's views--Buffaloes and tse-tse flies both once abundant in the valley of the Limpopo and many other districts south of the Zambesi, in which both have now become extinct--Permanence of all kinds of game other than buffaloes in districts from which the tse-tse fly has disappeared--Experience of Mr. Percy Reid--Sudden increase of tse-tse flies between Leshuma and Kazungula during 1888--Disappearance of the tse-tse fly from the country to the north of Lake N'gami after the extermination of the buffalo--History of the country between the Gwai and Daka rivers--And of the country between the Chobi and the Zambesi--Climatic and other conditions necessary to the existence of the tse-tse fly--Never found at a high altitude above the sea--Nor on open plains or in large reed beds--"Fly" areas usually but not always well defined--Tse-tse flies most numerous in hot weather--Bite of the tse-tse fly fatal to all domestic animals, except native goats and perhaps pigs--Donkeys more resistant to tse-tse fly poison than horses or cattle--Tse-tse flies active on warm nights--Effect of tse-tse fly bites on human beings Pages 149-177