British Scientists Conquering Tsetse Fly. New Drug Tests In Africa -- The scourge of tropical Africa - an infected tsetse fly. This species is found in large number at Kiboko, Kenya, site of the present large-scale Antrycide experiment. The trypanosomes are carried in the insect's hollow proboscis, clearly shown in picture. The flies are slightly larger than ordinary houseflies. British scientists have reported success in months - long experiments with the new drug Antrycide - latest weapon agai