BUTTERFLIES OF MONTANA. 65 



Butterfly Expanse, male, 1.70-2.00 inches, 45-50 mm.; female, 2.00 

 inches, 50 mm. The wings on the upper side of the male are bright yel- 

 lowish fulvous, but little obscured at the base. The outer margins are 

 edged by two fine lines which are occasionally confluent. The under 

 side of the fore wings is pale buff, laved with cinnamon brown at the 

 base and along the nervules; the spots on the margin and in the apical 

 area are well silvered. The hind wings on the under side are buff, with 

 'the basal and discal areas mottled with pale brown or pale olive-green. 

 The marginal belt is broad and clear buff; all the spots are well silvered. 



The female is like the male, but paler, with the dark markings, espe- 

 cially those of the margin, heavier; the marginal spots inclosed by the 

 lunules are much paler than the ground-color, and in many specimens 

 almost white. On the under side the wings in this sex are like those of 

 the male, but the fore wings are more heavily laved with ciannamon- 

 brown at the base. 



Early Stages The egg has been figured by Edwards, otherwise we 

 must say unknown. 



Distribution Common in Colorado, Montana, and British America, 

 showing much variation. Dyar calls erinna, bischoffi, artonis, clio, arge 

 and cunninghami varieties of the species. Eurynome has been taken in 

 the state by Cooley at Bozeman, 4,800 feet, and 9,500 feet; by Elrod in 

 the Swan Range at 6,500 feet, Flathead at 3,000 feet, and Mount Lolo; by 

 Douglass in the Tobacco Root Mountains 8,000 feet, Madison valley, Ruby 

 Mountains; by Brandegee on Mount Ascension and near Helena, and by 

 Barnes at Aldrich. Coubeaux says it is rather common in the Bear Paw 

 Mountains. Allen has collected it at Dillon. 



Var. Clio, the Clio Fritillary. The spots on the underside are with- 

 out silver. Otherwise like the type. 



Taken by Cooley in Gallatin County at 6,800 feet elevation, and at 

 Shields river at 6,700 feet. A specimen with very little silver was taken 

 by BJirod in the Swan range at 6,700. A female taken by Dr. Coues at 

 Chief Mountain August 21, 1874. 



Holland says "The female very closely resembles the female of 

 artonis, and in fact I am unable to distinguish the types of the two 

 species by any marks which seem to be satisfactory." 



Var. bischoffi, Bischoff's Fritillary, is like the type, but the upper 

 side is heavily obscured by black, concealing the basal wing markings. 

 The female has the spots within the lunules pale and almost white. It 

 is a boreal form. 



Taken by Cooley. Three specimens, one from Shields river, 6,700 

 feet, two from Gallatin county, one at 8,300 and one at 9,400 feet. 



Var. artonis, the Artonis Fritillary, may be distinguished "by the 

 entire absence of silvery scales upon the under side of the hind wings, 

 and also by the fact that the silver spots on the under side of the hind 

 wings are not compressed and elongated as much as eurynome, and by 

 the further fact that all the dark marginal markings of the under side 

 are obliterated. In the female the dark markings underneath are 

 heavier. It has been found in Colorado, Nevada, Utah and Arizona. We 

 have one specimen from the Yellowstone Park. 



