BUTTERFLIES OF MONTANA. 



145 



Butterfly — Expanse, 1:00 inches, 40 mm. Brown above, darker at 

 base of wings and anal angle; the white spots on the fore wings are mere 

 points, the number and size varying. On the under side the wings are 

 dark brown, shading into hoary-gray on the outer margins. The hind 

 wings are crossed by an irregular basal, median, and post-median brown 

 bands of darker spots, shaded with deeper brown internally. The trans- 

 lucent spots of the upper side reappear on the lower side of the fore 

 wings. 



Early Stages — The larva feeds on clover and other plants. 



Distribution — The insect is found throughout the United States and 

 Canada, but is not yet reported from the central masses of the Rocky 

 Mountain region (Holland). Dyar gives it in his list. We have not 

 taken it in the state. Wiley's collection contains one specimen from 

 Miles City, June, 1893; Coubeaux has two specimens from near Big 

 Sandy, 1904. 



Genus SCELOTHRIX. 



THE GRIZZLED SKIPPER, Scelothrix centaurea, Rambur. 



Fig. 104. 



Fig. 104. Venation of Scelothrix. 



Fig. 105. Scelothrix Centaurea. 



Butterfly — Expanse, about 1.25 inches, 31 mm. Upper surface black, 

 tinged with brown, sprinkled somewhat with white scales over the basal 

 half. There is a bar of white in the end of the cell of the fore wings, 

 a less distinct spot of the same below the middle of the cell, and a sub- 

 terminal row of white spots. There are first three spots in the sub-costal 



