BUTTERFLIES OF MONTANA. 



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Fig. 50. Argynnis nevadensis, lower side. 



THE HESPERIS FRITILLARY. 

 Argynnis hesperis, Edwards. Fig. 51. 



t-.g. 51. Argynnis hesperis, upper and lower surfaces. 



Butterfly The male on the upper side of the wing? is fulvous, shaded 

 with dark fuscous for a short distance from the base. The black spots 

 of the median band are rather broad, and seem to coalesce through dark 

 markings along the nervules. The under side of the fore wings is pale 

 ferruginous, tinged with a little buff at the tips. The under side of the 

 hind wing is dark ferruginous with a narrow buff sub-marginal band. 

 Ground color of the female is paler than the male. In neither are the 

 light spots marked with silver; they are opaque, yellowish white. Ex- 

 panse. 2.25-2.40 inches, 57-61 mm. 



Early Stages The life history remains to be learned. 



Distribution The butterfly is found among the mountains of Colo- 

 rado and Montana. 



