Bui. 536, U. S. Dept. of Agriculture. 



Plate XI. 



Hosts of the Mediterranean Fruit Fly. 



Fig. 1.— The Mediterranean fruit fly attacks cotton bolls about the 

 time they are nearly full grown. This attack, however, appears 

 to be of a secondary nature and follows that of the pink bollworm 

 (Pcctinophora gossipiella). As many as 10 well-grown larvae have 

 been removed from a single boll. Fig. 2. — Cross section of an apple 

 (Pyrus mains) showing the destruction caused by feeding larvae 

 of the Mediterranean fruit fly. (Original.) 



