42 EBERHARTS OUTLINES OF 



CHAPTER V. 



Injurious Coleoptera. 



Coleoptera (coleos, a sheath) are so named because the 

 front wings are usually horny and opaque and cover over 

 or shield the back or membranous pair, which are folded 

 longitudinally and transversely beneath them. These wing 

 covers are called elytra, (singular, elytron.) The members 

 of the order are called beetles. The common or popular 

 term for the larva is "grub" or "borer." 



THE CORN ROOT WORM. 



(Diabrottca longicornh . 



The beetle may be found in corn fields in August and 

 September feeding on fallen pollen and thistles and other 

 composite plants. 



About the middle of September the females deposit their 

 eggs in little clusters in the ground, at the bases of the hills 



Fig. 42. Adult Form of the Corn Root Worm. (Very highly enlarged.) 



of corn. These eggs are about one -fortieth of an inch 

 long, resembling minute hen's eggs. A microscopic exam- 



