60 



BULLETIN UNIVERSITY OF MONTANA. 



THE NEVADA FRITILLARY. 

 Argynnis nevadensis, Edwards, Figs. 49, 50. 



Fig. 49. Argynnis nevadensis, upper side. 



Butterfly — Expanse of wings, male, 2.50-3.00 inches, 63-75 mm.; 

 female, 3.00-3.50 inches, 75-88 mm. 



The ground color is pale fulvous, but little obscured with fuscous at 

 the base. The outer margins are heavily bordered with black. The dark 

 markings of the discal area are not heavy. The fore wings on the under 

 side are pale buff, the spots well slivered; the hind wings are greenish; 

 the belt is narrow and clear, and the spots are large and well slivered. 

 The female is much like the male, but larger and paler. The outer 

 margin of the fore wings in the female are more heavily marked with 

 black and marginal spots are light buff in color. 



"It is allied to Edwardsii in shape, and forms a sub-group with it. 

 It is brighter colored, smaller sized, and beneath the ground color is 

 yellow and buff, mottled in the male with pale olive-green, and in the 

 female with darker buff" (Edwards). 



Distribution — This species is found in the Rocky Mountains of Utah, 

 Nevada, Montana, and British America. Specimens have been taken 

 from Tobacco Root range by Douglass; Missoula by Elrod; Swan Range, 

 7,600 feet, by Elrod; Lolo Hot Springs by Elrod; Mount Ascension near 

 Helena, by Brandegee; Shields river, 9,000 feet, Gallatin Valley, East 

 Flathead, Park county, by Cooley. It thus ranges from 3,200 feet to 9,000 

 feet altitude. Collected by Coues in 1874 at Three Buttes, August 8 



