+--------------------------------------------------------------+ | | | EXPLANATION OF PLATE X | | | | | | 1. _Argynnis nokomis_, Edwards, ♂. | | 2. _Argynnis nokomis_, Edwards, ♀. | | 3. _Argynnis idalia_, Drury, ♀. | | 4 _Argynnis nevadensis_, Edwards, ♂, | | _under side_. | | 5. _Argynnis montivaga_, Behr, ♂, | | _under side_. | | 6. _Argynnis alcestis_, Edwards, ♂, | | _under side_. | | 7. _Argynnis bremneri_, Edwards, ♂. | | 8. _Argynnis electa_, Edwards, ♂. | | 9. _Argynnis atlantis_, Edwards, ♂. | | | | | | [Illustration PLATE X.] | +--------------------------------------------------------------+ _Butterfly._--The male on the upper side is bright fulvous, with the characteristic black markings of the genus. On the under side the wings are pale greenish-yellow, with the fore wings laved with bright pink at the base and on the inner margin. The spots of the upper side reappear on the under side as spots of silver bordered narrowly with black. The female has the ground-color of the upper side yellow, shaded outwardly with fulvous. All the dark markings of the male sex reappear in this sex, but are much broader, and tend to fuse and run into one another, so as to leave the yellow ground-color as small subquadrate or circular spots, and wholly to obliterate them at the base of the wings. On the under side this sex is marked like the male, but with all the markings broader. Expanse, 3.40-3.60 inches. This species, the male of which resembles the male of _A. leto_, and the female the same sex of _A. diana_, is as yet quite rare in collections. It has been taken in Arizona and southern Utah. We have no knowledge of the life-history of the species. (4) =Argynnis nitocris=, Edwards, Plate XIII, Fig. 4, ♂, _under side_ (Nitocris).