132 EUPERT W. JACK. 



(6). In Southern Rhodesia the passage of grass fires has, as a rule, no appreciable 

 efiect on the numbers of the fly. 



(7). Mopani belts are probably of considerable value to the fly in providing hmited 

 areas attractive to game in the wet season, where the grass remains short ; they 

 possibly also afford a convenient refuge from grass fires in the dry season. 



(8). The fly does not migrate under the stimulus of hunger or in company with 

 game. 



(9). The fly as a whole does not follow game about infested areas. 



(10). The maximum distance at which a hungry fly readily detects its hosts is a 

 short one, possibly less than 100 yards. 



(11). The maximum following distance of the females remains to be determined ; 

 the ^\Titer is not yet convinced that the females seek animals and human beings only 

 for the purpose of feeding, though this appears probable. 



