Corn Earworm as an Enemy of Vetch. tt 
ton bolls. There are two common forms found in. such _ places. 
One form has a dark amber head mottled with dark brown and a 
body that is almost black. Over the middle of the body are whitish 
lines running lengthwise. Along either side is a light-colored band. 
These bands usually are yellowish in color. The underside of the 
body is yellowish white and the feet are dark. The other form has a 
head of the same color as the preceding, but the body presents : 
marked difference in color pattern. The back is an olive gray with 
two narrow black lines close together running lengthwise over the 
middle. Along either side is a black band, and directly below it is 
a light one having the same color as in the other form. The under 
sides of the body and feet are as-in the 
preceding form. Other forms are modifica- 
cations of these. 
The skin of this caterpillar is finely 
granulated and somewhat greasy in ap- 
pearance. That of the fall army worm or 
of the true army worm is smooth and shiny. 
This difference aids in identification of the 
caterpillar. 
The length of life of the caterpillar de- 
pends upon the temperature of the period 
during which it lives. During the spring 
and early summer when the temperatures 
are not so high the length of this stage is 
from 22 to 28 days with an average of yy, 8 Pups of corn earworm. 
about 24 days. During the summer months — Twice natural size. (Quaint- 
this stage is somewhat shorter. aia ois 
Coming from eggs that were deposited at short intervals, the cater- 
pillars reach maturity at about the same time and consequently 
undergo the transformation stage together. This explains why cater- 
pillars may be seen in countless numbers in the evening and by the 
next morning may have disappeared entirely, causing great aston- 
ishment to the planter. 
p=) 
THE PUPA OR RESTING STAGE. 
Upon reaching maturity the caterpillar burrows into the soil to a 
depth of about 6 inches—the actual depth depending upon the tex- 
ture of the soil. A burrow is then constructed which runs backward 
and upward to within a few inches of the surface of the soil so that 
the moth upon emergence will be able to come out of the ground 
without any difficulty. (Fig. 7.) The caterpillar changes to a pupa 
at the bottom of the burrow. The shape and general appearance of 
_ the pupa may be seen in figure 8. The pupa is reddish or light brown, 
