Bui. 491 , U. S. Dept. of Agriculture. 



Plate XXI. 



Types of Damage by Larv/e of Melon Fly. 



Fig. 1. — Gall-like development formed about the eggs or very young larva; within a pumpkin. 

 Fig. 2. — Cross section of the wild host Sycos sp., showing destruction caused by larva. Fig. 

 3.— Seedling watermelon showing runner killed back by burrowing larvae. (Original.) 



