January 16, 1938. 10 miles northwest of Shinyanga, Tanganyika: A different experiment in tsetse fly control. The fly feeds not only on domesticated cattle, but on various species of wild buck, so that the government in an effort to maintain a fly-free district, is experimenting with various kinds of impenetrable cover to prevent the wild animals migrating into the area. The dark belt of mimosa (?) trees has been put up as an experimental barrier on the right of the road. At the left is a very narrow line of thorn bush which is also being watched. Native observers, sitting on high platforms, keep constant guard over the road and count the animals as they cross. c. 4500 feet.