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 (Jfonoxria puncticollis Say) 
Both the adult beetles and the larvee feed on the leaves of beets. 
Injury is begun by the beetles, which are one fourth of an inch long, 
brownish to black in color, each 
wing cover vaguely marked with 
an obscure lighter band. Eggs 
are laid on the leaves, and from 
these hatch the larvee, 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 
Fic. 146.— The Larger Beet Leatf-beetle. 
shown by low tubercles, the Enlarged and natural size. Original. 
tops of which are marked with 
light yellow, giving the larva a dotted appearance. The insect 
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 
trifurcata Fors.) 
| £ Black and yellow beetles, one 
sixth of an inch long, feed on the 
foliage of beans, cowpeas, and re- 
lated plants, eating holes in the 
Fic. 147.—The Bean Leaf-beetle. 
; ie leaves. The ground color of the 
Enlarged and natural size. Original. = 
insect is yellow or red, margined 
with black and with four black spots on its back. The larve live on 
the roots of the plants. The insect hibernates as an adult in any 
suitable shelter. 
