ARGYNNIS X. 
Female. — Expands 3 inches. 
Upper side dark ferruginous-brown from base to middle of disk, and beyond, 
to the brown marginal band, greyish-yellow. On the under side, primaries have 
the base and inner margin port-wine color and the apical and costal portion, as far 
as middle of cell, greyish-yellow; secondaries have the basal two-thirds deep ferru- 
ginous, and between the two outer rows of spots a clear band of greyish-yellow, 
brighter colored than on upper side ; spots as in the male. 
This species has been found somewhat abundantly in the Yo Semite district 
of California and in Oregon. The males that have reached our collections are 
mostly in good condition, but with the exception of two females received from 
Oregon, through the kindness of Mr. Henry Edwards, all the specimens of that 
sex known to me have been faded out to a pale brown and sordid white, without a 
trace of their original beautiful coloring. The contrast between the sexes in this 
species is of same nature as in Diana and Nokomis, and it is a very curious prob- 
lem how the sexes in these species have come to differ so remarkably when in near- 
ly every other member of the extensive genus Argynnis they are essentially alike. 
