108 BULLETIN UNIVERSITY OF MONTANA. 



Butterfly— Expanse of wings, 1.50 to 1.75 inches. The male is dark 

 in color; the female is paler. There are two eye-spots on the fore 

 wings in the usual location, indistinct on the upper, distinct on the lower 

 side of the wings.- The under sides of the wings are variable. In the 

 type they are dark; in other specimens they are paler. They may or 

 may not have ocelli on the secondaries. Both the fore and hind wings 

 are abundantly and evenly marked by little striae, and crossed on either 

 side of the median area by obscure, irregular, transverse dark lines, 

 either one or both of which may be wanting in some specimens. 



Early Stages — The caterpillar is green, cylindrical, tapering before 

 and behind, marked with longitudinal pale-yellow lines. The chysalis is 

 green or black, striped with narrow white lines. The larva feeds on 

 grasses. 



Distribution— It is found in the Northwest, ranging from British Col- 

 umbia as far as Mexico. In Montana it has been taken abundantly by 

 Wiley at Miles City and Sandstone. Brandegee has taken it at Mt. 

 Ascension near Helena. Allen has specimens from Dillon. Coues col- 

 lected it in 1874 at Frenchman's river and Chief Mountain. 



