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



Plate X. 





Damage to Squash by Larwe of the Melon Fly. 



Cross sections of unfertilized ovaries of three squash fruits showing a type of infestation, progressing 

 from figure 1 to figure 3. that brings about the complete destruction of the crop of many acres of 

 squashes and pumpkins where no care is taken to guard against oviposition. Note that the slight 

 infestation of figure 1 has extended up into the pistil of figure 2, while in figure 3 the larvae have 

 worked so rapidly that the ovary is breaking before the corolla can unfold. (Original.) 



