INSECTS INJURIOUS TO VEGETATION 



37 



of the United States. The yellow eggs are laid in groups of 

 twenty to seventy-five on the undersurface of potato leaves. 



FIG. 19. Potato beetle. Adult and young on plant, and adult enlarged. 



(Photo by O'Kane.) 



The larvae which hatch from the eggs feed on the leaves until 

 they are full-grown, then they burrow in to the ground, change into 



