TSETSE FLIES AND SLEEPING SICKNESS 



497 



disease and is likewise transmitted by G. palpalis. Rhodesian 

 sleeping sickness, however, is transmitted by G. morsitans. It 

 is the belief of some workers that the Rhodesian parasite is a 



Fig. 235. Typical breeding places of Glossina morsitans in Rhodesia. (From 

 photographs from Kinghorn and Yorke.) 



mere strain of the trypanosome, T. brucei, which causes nagana 

 in animals and which also is transmitted by G. morsitans. The 

 development of the trypanosome in the flies and the mode of 

 transmission is discussed on p. 99. 



