The Feeding Habits of Glossina swynnertoni Austen

These observations were made at Shinyanga, Tanganyika, in the preserved experimental area of tsetse bush known as Block 9. The exact site is shown in the top right-hand corner of Plate 21 of Buxton (1955), 11 mm from the top edge and 30 mm from the right-hand edge of the photograph. From April till July 1959, work was carried out under the small tree shown in P1. 1, D, its shade being reinforced with a tarpaulin stretched over its branches (not visible in the photograph). In September this spot seemed unproductive and work was moved 50 yd north to a tree, the shade of which was again reinforced with the tarpaulin, on the edge of the riverine thicket. The flies were caught by covering them gently with a 3 x 1 in. glass tube when they were about half way through their feed. They seemed unaware of the presence of the tube and finished feeding apparently normally. They were then removed from the tube, marked with a pair of colours to indicate