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



Plate II. 



Oviposition by Melon Fly on Watermelon Vine. 



Tip of a watermelon vine showing an adult melon fly ovipositing in the ovary of a flower still in 

 bud, an unaffected male bloom, and the withered and drooping growing tip of the vine. A 

 female melon fly has deposited eggs in the vine at the base of the leaf petiole, and the young 

 larvas hatching have nearly severed the vine at this point. (Original.) 



