TSETSE FLIES, TUMBU FLY 295 



a baobab. The Palpalis feed largely on the 

 crocodile, the Morsitans on animals. 



The distribution of tsetse flics in the colony 

 is imperfectly known, as they were not recognized 

 as the cause of sleeping sickness when the Portu- 

 guese scientific mission in 1902 found the disease 

 at Cabinda, Mussera, Ambriz, Loanda, Novo 

 Redondo, and Benguella. The Glossina palpalis 

 fly was subsequently found at some of these 

 ports and along those rivers which empty into 

 them. 



The Congo River, which forms the northern 

 boundary of a large part of Angola, is infected with 

 the fly and sleeping sickness, and the disease is 

 spreading up certain of its fly-haunted southern 

 tributaries. Farther to the south there is fly and 

 sleeping sickness along the Coanza River and some 

 of its southern tributaries. So that it can be said 

 that the disease is present in a great part of north 

 Angola. 



To the south the tsetse distribution is almost 

 unknown. Glossina morsitans has been found 

 near Caconda, and G. palpalis along the Cuba! 

 and Catumbella Rivers, and doubtfully reported 

 as present between Benguella and Mossnmedes 

 find on the Cunenc. Baum saw no tsetse on the 

 Cubango. Cuito, or Cuando, but Boers and natives 

 report them as present at a few points near these 

 rivers. (The rinderpest which destroyed so much 

 game some years ago everywhere diminished the 

 numbers of tsetse fly.) 



The central highlands of Angola, including 

 millions of acres of bracing open country, are free 



