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Published online by Cambridge University Press: 10 July 2009
Throughout the Nyasaland Protectorate there are many areas which are infested by Glossina morsitans; and this species is also to be found in North Eastern Rhodesia, and in German and Portuguese territory bordering on Lake Nyasa. I have been frequently through all these territories during the last 22 years, and know them well.
* [The fact that the terms “fly-belt” and “ fly-area ” are frequently used as though they were interchangeable is apt to cause confusion. It would be well therefore to restrict the term “ fly-belt ” to country in which Glossina is actually existent; whereas the word “ fly-area ” would have a wider sense, signifying a district which is liable to be infested by tsetse, either wholly or in part. Thus evidence as to the alteration of fly-belts would not necessarily be in conflict with the author's view that the limits of fly-areas are stable.—Ed.]