BEETLES AND GRUBS EATING THE LEAVES 



147 



are two broods each season. The pest is easily killed by the 

 application of Paris green or arsenate of lead. 



The Larger Beet Leaf-beetle (Monoxia pimcticollis Say) 



Both the adult beetles and the larvae feed on the leaves of beets. 

 Injury is begun by the beetles, wliich are one fourth of an inch long, 

 brownish to black in color, each 

 wing cover vaguely marked with 

 an obscure Ughter band. Eggs 

 are laid on the leaves, and from 

 these hatch the larvae, which 

 add to the damage. The full- 

 grown larva is one third of an 

 inch long, rather robust, and 

 nearly black in ground color. 

 The segments are distinctly 

 shown by low tubercles, the 

 tops of which are marked with 

 light yellow, gi\'ing the larva 



Fig. 146. — The Larger Beet Leaf-beetle. 

 Enlarged and natural size. Original. 



The insect 



a dotted appearance, 

 appears to breed normally on native wild plants. 



Its work may be checked by the 

 prompt application of Paris green 

 or arsenate of lead. 



The Bean Leaf-beetle {Ceratoma 

 tr if areata Fors.) 



Black and yellow beetles, one 

 sixth of an inch long, feed on the 

 fohage of beans, cowpeas, and re- 

 lated plants, eating holes in the 

 leaves. The ground color of the 

 insect is yellow or red, margined 

 with black and with four black spots on its back. The larvae live on 



Fig. 147. — The Bean Leaf-beetle. 

 Enlarged and natural size. Original. 



the roots of the plants, 

 suitable shelter. 



The insect hibernates as an adult in any 



