ARGYNNIS I. 
edged with black ; a dash at base of cell, and another at base of subcostal inter¬ 
space ; the shoulder and inner margin silvered. 
Body above fulvous, beneath buff; legs buff; palpi buff, fulvous above and at 
tip ; antennae black, annulated with grayish above, fulvous below; club black, tip 
ferruginous. 
Female. — Expands 2 inches. 
Color paler, the spots in the sub-marginal lunules sordid white ; the marginal 
bands broader and all the markings heavier ; the second row of silvered spots 
indicated above by a shade lighter than the ground; the basal area of primaries 
beneath deep colored. 
Occasionally an example of either sex is seen in which is no silvering, all the 
spots then being of nearly the same color as the ground. 
Egg. — Conoidal, broad at base, truncated at summit; marked by numer¬ 
ous horizontal striae, and vertically by about twenty prominent ribs, some of 
which are intersected by shorter ribs which proceed from the base and connect 
at about two thirds the distance to the summit; color at first lemon-yellow, soon 
turning to purple. Deposited upon Viola. 
Larva unknown. 
From Colorado and the Rocky Mountains. Mr. T. L. Mead found this species 
common throughout the northern sections*of the State, in 1871, “flying among 
the grasses and along the streams. It began to appear at Fairplay, 6th June, 
and was especially abundant at Twin Lakes.” I have also received specimens 
from Dr. Hayden’s Colorado expedition, and one or two from Montana. These 
last were erroneously mentioned by me in the Reports of the Geological Survey 
of Montana, 1871, as Montivaga, Behr, a species, so far as I know, confined to 
the Pacific coast. I have seen Eurynome in no collection from Utah, nor from 
Arizona, or New Mexico. It would seem to be strictly a mountain species, most 
abundant in Colorado, and to be found more or less through the territories 
adjoining on the north. 
