130 THE BUTTERFLIES OF THE WEST COAST 



Nokomis, Nitocris, and Leto, are so much alike that if you have 

 only one specimen, you may be puzzled to decide which one of 

 the three it is. 



no. Argynnis Leto. 



Plate XII; Figures no, a, b, c. 



Fig. no, Male, Sisson, Cal., July 20, 1891 ; Author. 



a, Male, underside, Mt. Shasta, July, 1891 ; Author. 



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



c, Female, underside, Portland, Oregon, Aug. i, 



1890; Author. 

 Leto has no normal female but all the females are like the one 

 here shown, black, or more strictly, brown-black, with sub-mar- 

 ginal band of bright golden-yellow. The question whether there 

 ever were any normal-colored females in these three species, is an 

 interesting one. Leto is a fair type of these three species having 

 only black females. All these three were evidently at one time 

 but one species, but climatic or other influence of environment 

 has caused some small differences in their markings and has sep- 

 arated them somewhat in territory, for between Leto and the 

 other two there is a wide strip of unoccupied territory, not inhab- 

 ited by any one of them. 



111. Argynnis Letis, n. v. Not elsewhere illustrated. 

 Plate XII; Figure in, Male; Sisson, Cal., August, 1891 ; 



Author. 

 Letis appears to be a variety of the preceding, Leto, in which 

 the dark markings are obsolescent, especially on the apices of fore 

 wings and over all of the hind wings, as is shown very well on the 

 plate. There is no known female, either normal or black, for 

 this variety. I have taken many of the ordinary black females, 

 but no one of them shows a corresponding obsolescence. 



112. Argynnis Carpenteri. Elsewhere illustrated only in 



Edwards" Butt. N. A. 

 Plate XIII ; Figures 1 12, a, b. 

 Fig. 112, Male, Vancouver Island, July, 1891 ; Author. 



a. Female, underside, Vancouver Island, July, 



1891 ; Author. 



b. Female, Vancouver Island, July, 1891 ; Author. 

 This species is by some accounted as a western representative 



or variety of the eastern Cybele ; it is a good deal smaller than 



