GENUS ANTHOCHARIS 109 



abroad regarding it. Thoosa type was taken in the canyon of the 

 Virgin River, in southwestern Utah. My examples of Thoosa 

 were taken in the adjoining region of southeastern California. 



64. Anthocharis Julia. 



Plate VIII ; Figures 64, a, aa, b, bb, c. 



Fig. 64, Male, Central Montana, June 30, 1892 ; Author. 



a, Male, Sierra Nevadas, 7,500 feet altitude, June, 



1891 ; Author. 

 aa, Male, underside, Colorado Mountains, i88g; D. 

 Bruce. 



b, Female, Western Colorado Mountains, 1889; 



D. Bruce. 



bb. Female, Shasta Mountains, no date ; Author. 



c. Female, underside, Rocky Mountains, 10,000 feet al- 

 titude; D. Bruce. 

 Size of Thoosa ; much the same aspect, the black markings are 

 a little less heavy; and the marblings on underside are "foliated," 

 but the two forms are similar ; especially when we consider that 

 Thoosa is a warm desert form and that Julia is a high moun- 

 tain species, and might well be expected to be very different in 

 appearance. Julia is chiefly a Colorado butterfly, but is occa- 

 sionally seen on the high mountains of Central California, at an 

 altitude of not less than 7,000 feet. It seems to be an alpine 

 species throughout its range, in Colorado as well as in the Sierra 

 Nevadas. It is usually seen flying on the mountain sides and 

 peaks in places that are partially clad with pine and other trees ; 

 being in this respect somewhat remarkable, as only three or four 

 other butterflies have similar habits. 



65. Anthocharis Flora. f 

 Plate VIII : Figures 65, a, aa, b, bb, c. 



Fig. 65, Male type, Tenino, Wash., May, 1890; Author. 



a, Male, Mountains of Southern California, 5.000 feet 



altitude, Feb., 1888. 

 aa, Male, underside, Portland, Ore., May 2, 1890; 

 Author. 



b, Female type, Tenino, Wash., May, 1890; Author. 

 bb. Female, San Gorgonio Pass, Cal, March, 1895 ; 



Author. 



c, Female, underside, Portland, Ore., May, 1890; 



Author. 



