Chapter IX: 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