56 



a week later, and was changed to a moth on the 22d of October. 

 No person who has read the above facts can doubt that these three 

 moths were produced from the worms which hatched from eggs 

 deposited by the moths which appeared in the forepart of the pre- 

 ceding August. 



On the ti9th of October my brother (Mr. A. C. Coquillett, who 

 has aided me much in studying out the hfe-history of this and of 

 many other insects) brought me an Army Worm which measured 

 about one-half of an inch in length ; on the first of November he 

 brought me four of these worms ; one measured seven-eighths and the 

 others three-fourths of an inch in length. Three days later he 

 brought me another Army Worm, and on the following day he 

 brought me a second ; the first of these measured about three-eighths, 

 and the last one about one-half of an inch in length. All of these 

 were found in or beneath shocks of corn. 



This is as far as I have been able to carry the history of this 

 insect. My attention was not called to it until the month of July, 

 1881, when I received a communication from Prof. Cyrus Thomas, 

 requesting me to study up the life-history of this insect in this local- 

 ity. 



Description. 



As the Army Worms which I have found differed in a few respects 

 from the descriptions given by other writers, I append a description 

 of them herewith. To avoid confusion only one side of the worm's 

 body is described. 



A white dorsal, sub-dorsal and stigmatal line, the second being 

 midway between the other two ; the dorsal space — the space lying 

 between the dorsal and sub-dorsal lines — is sometimes pale, green- 

 ish-ash ; at other times the upper half of this space is of the above 

 color and the lower half is dark brownish, lighest in the middle and 

 edged about with a whitish line ; below the sub-dorsal white line is 

 a pale yellowish stripe, or a pinkish stripe with a yellow line in the 

 middle, and edged below with a white line : between the latter and 

 the stigmatal white line is a greenish-ash stripe mottled with brown, 

 or a brownish stripe in the middle of which is usually a light colored 

 line ; below the stigmatal white line is a pinkish or yellowish stripe, 

 usually edged below with a light colored line ; below this the body 

 and venter is pale greenish mottled with pale brown or yellow ; 

 piliferous spots sub-obsolete, black ; spiracles wholly black ; length 

 about one and one-half inches. 



Head greenish-white or pale-brownish, usually covered with a net- 

 work of brown lines, and marked with two curved diverging brown 

 stripes near the middle of the face. 



The younger worms are usually darker colored than the older 

 ones. The principal colorational difference is to be found in the 

 stripes below the sub-dorsal and stigmatal white lines. 



In the lighter specimens these stripes are pale yellowish, but in the 

 darker ones they are strongly tinged with pink, and have a lighter 

 line in the middle. 



In one specimen which I found on a wild Aster on the 30th of 

 July, the entire body was strongly suffused with pink. 



