Note 55 — VI.

Most valuable comprehensive details, as to the natural history of the tsetse-fly, its ravages, and its migration into the districts which it frequents, are to be found in the "Transactions of the Royal Society," Volume XX., page 148; "Proceedings of the London Geological Society," page 217; Charles John Anderson's "Lake Ngami; or, Explorations and Discoveries during Four Years' Wanderings in the Wilds of Western Africa," London, 1856; Dr. Livingstone's "Missionary Travels and Researches in South Africa," London, 1857. The agent of the London Missionary Society at the Cape of Good Hope, the estimable, highly respected Dr. Thompson, gave us a small piece of a root called fly-root, which is considered to grow from a parasite, and a decoction of which is reckoned by the aborigines an antidote to the bite of the tsetse-fly. Unfortunately the requisite material was not in sufficient quantity to admit of determining the plant itself, or of instituting further researches with it.