6 Farmers’ Bulletin 1193. 
The beetles issue from their winter quarters in March and April, 
feed, mate, and deposit their eggs. The first generation of beetles 
from these eggs, as observed in Colorado, appears late in May or 
Ivica. 5.—Food plants of beet leaf-beetle: A, Sugar-beet leaves riddled 
by beet leaf-beetle; B, a less injured leaf; C, lamb’s-quarters killed 
by larve of beet leaf-beetle; D, sea-blite killed by same. 
early in June, and tne second generation becomes mature during the 
latter part of July. The eggs hatch in from 8 to 18 days, the larvee 
