146 PESTS OF GARDEN AND FIELD CROPS 
out from these quarters 
early in the spring, and 
begin laying eggs as soon 
as food plants are avail- 
able. Usually the over- 
beetles live 
and continue laying 
eggs for a considerable 
period. The grub en- 
ters the ground to pu- 
pate, when it has be 
come full grown. There 
wintering 
are two generations an- 
nually. 
Poisoning by means 
of Paris green and lime, 
or lead arsenate, is the 
Fic. 144.— Eggs of the Colorado Potato-beetle. remedy. 
Original. 
Slightly enlarged. 
simplest and best 
Use a rather 
heavy dose and apply 
early, as soon as the potato tops are a few inches high, repeating 
as needed. 
The Three-lined Potato Beetle (Lema trilineata Oliv.) 
Injury by this species is about 
the same as that done by the 
Colorado potato-beetle. The 
eggs are laid along the midrib 
of the leaf. 
itself with a 
ment. The 
some beetle, 
The larva covers 
mass of excre- 
adult is a hand- 
its body striped 
black. 
Its length is a little more than 
There 
with light yellow and 
one third of an inch. 
Fic. 145.— The 
Beetle. 
Original. 
Three-lined Potato 
Enlarged and natural size. 
