FAMILY MUSCIDM 285 



of sleeping sickness in man has received perhaps the greater 

 attention in recent years. 



It can easily be seen that the introduction of either of 

 these species into this country or even into South America, 

 with the opportunity for further distribution would be a 

 most serious menace, as there would be every possibility of 

 the introduction of the diseases which are associated with it. 

 These are perhaps examples of insects which deserve most 

 careful attention from the stand-point of possible exclusion, 

 and every effort made to learn their habits in detail and to 



Fig. 230. — Lucilia cccsar — enlarged. (Howard, Div. Ent., U. S. Dept. Ag.) 



avoid such means of transportation as might possibly serve 

 to transfer them to this country. ■ It is reported that such 

 an introduction has occurred in Australia. 



Blue-bottle Fly {Lucilia ccesar).- — The blue-bottle fly is 

 another species which is very abundant and almost uni- 

 versally distributed. Its attacks are made upon any avail- 

 able fleshy material such as carcasses of dead animals, fish, 

 and so on. The female deposits eggs on living animals that 

 have bruises or wounds or attractive points for deposition. 

 Sheep are especially subject to attacks of this sort. The 

 maggots of the flies do not limit themselves to the external 



