Bu 



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









Plate XXI. 



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Types of Damage by Larv/e of Melon Fly. 



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

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

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



