166 THE BUTTERFLIES OF THE WEST COAST 



b, Female, San Bernardino, CaL, October, 1896; 



Author. 



c. Female, underside, San Bernardino, Cal., Octo- 



ber, 1896; Author. 

 This species, like the preceding, Tharos, used to be thought an 

 Eastern species, but it is now found over the same territory as is 

 Tharos. Marcia was once called the winter form of Tharos, but 

 on this Coast they both appear at all times of the season, so that 

 the old theory of seasonal forms does not hold good ; and I see no 

 reason why the one is not just as good a species as the other. Cer- 

 tainly, neither form is a seasonal variety of the other, here on the 

 West Coast. 



201. Phyciodes Pratensis. 



Plate XXI: Figures 201, b, c. 



Fig. 201, Male, Lake County, Cal., June, 1894; Author. 



b. Female, Oregon, 1892 ; Author. 



c. Female, underside, Helena, Mont., June, 1891 ; 



Author. 

 Pratensis is a widely-diffused species, of rather northern habi- 

 tat, as it never comes south of the latitude of San Francisco, so 

 far as I know, although it is credited to Arizona, but erroneously, 

 I think. At one time Pratensis stood for a good part of all the 

 varied species of Phyciodes on the West Coast, and any new form 

 was set down as "one of the endless varieties of Pratensis," by a 

 certain learned gentleman of the East, who could not believe that 

 there was room for more than one species, in all this vast West- 

 ern country. 



202. Phyciodes Orseis. 



Plate XXI ; Figures 202, b, c. 



Fig. 202, Male, Ellensburg, Wash., May, 1890; Author. 



b. Female, Tehachapi Mountains, So. Cal., 1892; 



Author. 



c. Female, underside, Ellensburg, Wash., May, 



1890; Author. 

 Orseis enjoys a vast range. It is a mountain form in the south- 

 ern part of its range, as in the Tehachapi Mountains, and in Ari- 

 zona and Mexico, but it inhabits the plains and lowlands in the 

 more northern countries. It has the same type of markings as 

 Pratensis, but is much darker on the upper side ; and much lighter 



