This butterfly, which is still rare in collections, has been taken in southern California. It may be an extreme variation of the next species, _A. adiante_, Boisduval.
(40) =Argynnis adiante=, Boisduval, Plate XIV, Fig. 4, ♀ (Adiante).
_Butterfly_, ♂.--The wings on the upper side are bright fulvous; the black markings are slight. The fore wings on the under side are pale buff, much lighter at the apex, laved with orange-red at the base. The hind wings are pale buff, clouded with fawn color on the basal and discal areas. All the spots which are generally silvered in other species are in this species wholly devoid of silvery scales.
♀.--The female is like the male, but the black markings on the upper side are heavier, and the basal area and inner half of the primaries are laved with brighter and deeper red. Expanse, ♂, 2.30-2.40 inches; ♀, 2.30-2.60 inches.
This species is found in southern California, and is somewhat local in its habits, hitherto having been taken only in the Santa Cruz Mountains.
(41) =Argynnis artonis=, Edwards, Plate XII, Fig. 13, ♂, _under side_ (Artonis).
_Butterfly_, ♂.--Closely resembling _A. eurynome_, Edwards, from which species it may be at once distinguished by the entire absence of silvery scales upon the under side of the wings, and also by the fact that the silver spots on the under side of the hind wings are not compressed and elongated as much as in _eurynome_, and by the further fact that all the dark marginal markings of the under side are obliterated.
♀.--The female does not differ materially from the male, except that the dark markings on the upper side are all much heavier, standing out very distinctly upon the paler ground, and the marginal spots within the lunules are very light in color and relatively large. On the under side the fore wings are laved with red, very much as in the female of _A. adiante._ Expanse, ♂, 1.75-2.00 inches; ♀, 2.00-2.15 inches.
_Early Stages._--These still remain to be ascertained.
This interesting butterfly, which seems to indicate a transition between the butterflies of the Adiante-group and those of the Eurynome-group, has been found in Colorado, Nevada, Utah, and Arizona.
(42) =Argynnis clio=, Edwards, Plate XIV, Fig. 5, ♂; Fig. 6, ♀; Fig. 7, ♂, _under side_ (Clio).