154 



ELEMENTARY ENTOMOLOGY 



From North Carolina and Ohio to Maine the elm leaf-beetle 

 (Galerucella luteold] is the worst insect pest of elm foliage, both 



FIG. 221. The Colorado potato-beetle. (Enlarged) 



a, beetle ; 6, eggs ; <r, young larva ; d, full-grown larva. (After Chittenden, United States 

 Department of Agriculture) 



adults and larvae skeletonizing the leaves and so defoliating trees 

 that, where injured annually, many are killed. The beetles are 

 one fourth of an inch long, yellowish-brown, with black stripes at 



