346 TSETSE FLIES 



elephant, rhinoceros, hippopotamus, lion, buffalo, 

 fourteen different species of antelope, and that 

 of many small mammals, including monkeys, 

 rats, and mice. The conclusions at which they 

 arrived, as the result of this extensive investiga- 

 tion, were of great importance. They indicated 

 that a number of the antelopes (percentage and 

 names not stated) were found to be infected with 

 trypanosomes identical with those producing 

 sleeping sickness in human beings and " fly 

 disease " in domestic stock. Taking the great 

 game as a whole, it was found that something 

 like fifty per cent of the animals were so in- 

 fected, although, doubtless owing to oversight, 

 or possibly uncertainty as to the species to 

 which they belonged, the names of the innocent 

 varieties have not, so far as I am aware, been as 

 yet made known to us. 



So far, then, the commission had succeeded 

 in carrying out the task entrusted to them. 

 They had found that in North-Eastern Rhodesia, 

 and Nyasaland also, in all probability, the trans- 

 mitting agent of sleeping sickness which had 

 grown so gravely common was, without doubt, 

 the hitherto unsuspected common Glossina 

 morsitans, whose previous character, though 

 besmirched by its offences against horses and 

 cattle, had never been assailed by suspicion of 

 crime so grave as the spread of sleeping sickness. 

 To complete their success the commissioners 

 had further placed their fingers upon the reservoir 

 or host of the hitherto mysterious parasites of the 

 terrible disease. 



