92 INSECTS INJURIOUS TO THE POTATO. 

young and fully grown larve ; e, pupa; d, beetle ; e, left wing 
cover, magnified; /, leg, magnified) has chiefly attracted 
attention at the West during the few years past. It has been 
very destructive, hence anything bearing upon its habits is 
Fig. 13. 

interesting to farmers. Last year they were more numerous 
in Illinois than at any other time. Whole acres were entirely 
destroyed by them. The autumn following the early frosts " 
that killed the potato vines, was one of the finest we ever - 
enjoyed. This unusually late pleasant weather induced the | 
pups of the last brood of the Colorado Beetle to mature - 
and come out of the ground instead of remaining in over - 
winter, and the lack of food i in the fall, together with the cold |. 
open winter, contributed greatly to their destruction. From | 
this one can easily see their assailable points, and devise - 
means for holding them in check. It is manifest that this can | 
be done most effectually by the concerted action of the farm- 
ers of the whole country. I think it needs no argument to — 
prove that it would be better for the entire North-west, so far - 
as the Colorado Beetle has extended, to abstain from planting | 
potatoes for one year, than to be annoyed as they have been - 
in Iowa and Illinois during the few past years. Or, per haps, 
it might be as. effectually managed by pon) only eur 




