The Seasonal Abundance of Blood-Sucking Flies in a Grassed Woodland Area in Central Tanganyika

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Abstract
Records are presented of catches of Hippobosca longipennis and a number of Tabanidae over 30 months, 1940-2. All spp. were taken in greater numbers near streams. All Tabanidae have a ''flight season'' when adults are found, and an off-season when they are not. Phara speciosa and the Pangoninae appear to have but 1 generation a yr. in Mywapwa. Mesomyia fallaax probably has 2. The other Tabanidae may have several. Maximum numbers of adults of a particular species do not normally occur in the same month in subsequent yrs., nor do the flight seasons exactly coincide in subsequent yrs. Cattle are not herded close enough to game to enable mechanical transmission to occur from game to cattle. The possibility of using other biting flies as indicators for Glossina spp. is considered and found unsuitable.

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