128 THE BUTTERFLIES OF THE WEST COAST 



bb, Female, Vancouver Island, July 2, 1891 ; Author. 

 c, Male, underside. Lake County, Cal., June, 1894; 

 Author. 



Chrj'somelas I have found to be rather widely spread, and have 

 taken it from Vancouver Island on the north to Lake County on 

 the south, as noted in the data above given. It is much more 

 common than Occidentalis, and in some places it is rather com- 

 mon, and several specimens can be taken in a half-day. Many 

 examples cannot be separated from Occidentalis by the upper side, 

 but the underside is always distinct in its peculiar deep yellow 

 color, when contrasted with the gray of Occidentalis. 



Nothing is known of the habits of Chrysomelas. 



88. Colias Alexandra. 



Pl.\te XI ; Figures 88, b, c. 



Fig. 88, Male, Pendleton, Eastern Washington, Aug. 10, 

 1890; Author. 



b. Female, Colorado, no date ; from Dr. Barnes. 



c. Female, underside, Shoshone, Idaho, Aug. i, 1890; 



Author. 



This, and the next, Edwardsi, are twin species, like the two pre- 

 ceding, and are very similar in appearance, so that sometimes they 

 are difficult to separate. Generally, Alexandra is a little larger in 

 size, the hind wings are broader, the discal spot is pearly, and the 

 underside of hind wing is somewhat chalky-white. 



The range of Alexandra is from the Rocky Mountains to the 

 Sierra Nevadas, but its southern limit is about the north line of 

 L'tah. On the West Coast, therefore, the only place to find this 

 species is Eastern Washington and Oregon. 



89. Colias Edwardsi. Not previously figured in accessible 



form. 

 Plate XI ; Figures 89, b. 



Fig. 89, Male. Portland, Oregon, Aug 20, 1890; Author. 



b. Female, Portland, Oregon, Aug. 20, 1890; Author. 



Generally a trifle smaller than the preceding (though the female 



here is unusually large, and is therefore misleading,) ; the wings 



are more pointed in shape, and the discal spot on underside of 



hind wing is orange instead of pearly. 



Edwardsi is sometimes considered as a western variety of 

 Alexandra, and if it occupied the same territory with Alexandra 



