INSECTS AFFECTING MAN AND ANIMALS 189 



upon the food supply, as they are able to go for, long periods 

 without food. 



II 







-. ,O T 



s^ .^ 

 M T! 



3 I 



:1 



The best remedy under ordinary circumstances is gaso- 

 line or kerosene. Every crevice in and about beds, and in 



