192 Naturalist at Large 



November 27. Larvae Nos. i and 3 were quiet and 

 gave very little trouble during the night, but this 

 morning they became active and protruded so far that 

 I thought they were about to emerge. No. 3 con- 

 tinued more or less movement during the early morn- 

 ing and the dressing was removed several times to see 

 what was taking place. At each time the larva was 

 partly out of the hole, but it always withdrew again 

 after coming out about so far. At 10 a.m. a movement 

 was felt on my skin at the lesion and upon examination 

 the larva was found to be coming out. It appeared to 

 be doing very little struggling, yet it slowly came from 

 the hole and dropped over on my arm. 



I may add that I have never yet seen a howler monkey 

 that was not infested by these botflies, nor have I ever seen 

 a marmoset or other species of monkey that was. The 

 howlers evidently do not know how to get rid of them 

 and I have, on two occasions at least, found a howler 

 monkey that had fallen in a dying condition to the forest 

 floor, evidently seriously weakened by a heavy infesta- 

 tion of these awful fly larvae. 



