Flies that carry sleeping sickness

Usage examples of tsetses.

Bruce held dying monkeys across their flanks, and let harmless tsetses, bred in the laboratory, feed on the monkey and then on the buck.

How melancholy and lean have been the years, since then, for that murderous tick whose proper name is Boophius bovis, and you may be sure that since those searchings of David Bruce, the tsetses have had to bootleg for the blood of black natives and white hunters, and missionaries.