GENUS PHYCIODES 167 



on the underside, being a smooth, pale yellow beneath. Some 

 writers have theorized that Orseis was a mountain form of Pra- 

 tensis, but Orseis flies a thousand miles south of any locality of 

 Pratensis. 



203. Phyciodes Camillus. . 

 Plate XXI ; Figures 203, b, c. 



Fig. 203, Male, Pendleton, Oregon, July, 1890; Author. 



b. Female, Colorado, no data, 1886? Nash. 



c, Female, underside, Tucson, Arizona, June, 1893 ; 



F. Stephens. 



This common species covers the whole country west of the 

 Rocky Mountains, from Mexico to Canada, with a probable over- 

 flow to the north and to the south, with the exception that it is not 

 found on the immediate Coast near the Pacific Ocean. Like most 

 wide-spread species, examples from widely separated localities 

 vary somewhat, but on the whole, it is quite constant and uniform 

 in its appearance. 



Food-plant : Aster, various species. 



204. Phyciodes Mylitta. 



Plate XXI ; Figures 204, b, c. 



Fig. 204, Male, Portland, Oregon, June, 1891 ; Author. 



b, Female, San Bernardino, Cal., May, 1897; 



Author. 



c, Female, underside, San Bernardino, Cal., June, 



1899; Author. 



Mylitta resembles the preceding in a good degree, but is much 

 lighter having fewer dark spots, and the ornamentation is inclined 

 to be indistinct or obsolescent. The range of Mylitta is about the 

 same as that of Camillus ; I have taken it near the Mexican line 

 on the south and at Puget Sound at the north, and in Montana; 

 and it goes eastward to Colorado. It differs from Camillus in that 

 it flies to the edge of the sea, and does not go far up into the 

 mountains, even at the south. 



Food-plant : Carduus, thistles. 



204a. Phyciodes Barnesi. 



Plate XXI ; Figures 204a, aa. 

 Fig. 204a, aa, Colorado, no data, from Dr. Barnes. 

 In Colorado is found "a large, pale, Mylitta," that is named 



