122 MAINE STATE COLLEGE 



the ueck (cervex) dark l)rown. . A few short hairs scattered over 

 other parts of the body. See Fig. 4, c. When full grown the 

 worm enters the ground, forms a cocoon of earth interwoven 

 with silk and changes to the chrysalis. 



Chri/salis — length .8 of an inch. Color light chestnut brown, 

 the dorsal line, stigmata and divisions of the segments darker. 

 Kather slender, an indentation on the back where the abdominal 

 segments begin, the last four segments moveable, two thorns at 

 the extremity. See Fig. 4, d, which shows the chrysalis in the 

 cocoon. 



Moth — expanse of wings 1.5 inches. The color is quite vari- 

 able in depth of shading. The more common color of the fore 

 wings is pale clay yellow, with a faint greenish tint, and marked 

 with darker olive, dark brown, or even black. A dark, conspicuous 

 spot near the middle of each fore -wing. Hind wings paler with a 

 dark brown band along the outer margin interrupted in the middle 

 by a large pale spot. 



The moth with expanded and closed wings is shown in Fig. 4, e 

 and f. 



Life History. 



In Maine there is probably only one brood of the moths, at 

 least we have no evidence bearing upon the subject to indicate 

 more than one. The moths probably are on the wing early in 

 August. (The larvae we received on September 10th were of 

 various sizes, some full grown, and though we have not taken the 

 moths in Maine we know the larvae require three or four weeks to 

 mature, and the eggs several days to hatch which would require 

 that the moth be on the wing early in August). The small worms 

 found in the corn received were from eggs laid on the same ears 

 later, requiring that the moths continue on the wing for some weeks 

 or the time of emerging from the chrysalis extends over consider- 

 able time. 



The moths mate and the females lay their eggs probably one in 

 a place upon the food plant. They are on the wing early in the 

 evening. The eggs are laid upon the leaves, tassels, silks or husks 

 and hatch in a few clays. The worms gnaw through the silk at 

 the top of the ears and feed upon the kernels forming channels at 

 the top of the ears. They will gnaw holes through the silk and 

 go to other ears on the same stalk or even go to new hills. After 

 feeding about three weeks or longer according to the season and 



