160 THE BUTTERFLIES OF THE 



yellow is orange or reddish yellow, and the lower lateral 

 spines are of this color half-way to the tip. 



The mature larva is about 1.5 inches long, cylindrical, 

 velvety black. The six rows of spines are of about 

 equal length, the dorsals about .15 of an inch, those on 

 the top of the second segment directed forward, and all 

 are beset with short black bristles. Those on the dorsal 

 rows are translucent brown at base, except on joints 3 

 and 4, where they are dull yellow ; all of the two lateral 

 and the intermediate rows are dull yellow from the base 

 half-way to the top ; tops of all the spines black. Head 

 subcordate, deeply cleft, flattened in front, on each vertex 

 a small conical process. It moults five times in coming 

 to maturity. 



The chrysalis is of the same shape as that of Diana, 

 the color varying. Some are red-brown irregularly 

 mottled with black, others are drab and black. 



Like the others, the food-plant is violets. 



Michigan, Illinois, Iowa, Montana, Colorado. 



42. ARGYNNIS ATLANTIS, Edw. 



Expanse of wings about 2.5 inches. 



Upper surface fulvous, obscured by brown scales on 

 the fore wings from the second bar in the cell obliquely 

 to below the median zigzag line on the hind margin ; 

 the two marginal lines of both wings so blended that 

 not much of the ground color is left. Marks as in A. 

 Aphrodite. 



The under side of fore wings is reddish fulvous, the 

 costa and apex light buff, the apical patch and outer 

 margin brown, with the usual apical silver spots. The 

 hind wings are dark red-brown, much mottled with 



