_Chrysalis._--Closely resembling the chrysalids of the preceding genera.
This genus is very widely distributed in the temperate regions of both hemispheres. Many of the species are inhabitants of the cold North or high mountain summits, while others are found in the tropics.
(1) =Lycæna fuliginosa=, Edwards, Plate XXX, Fig. 16, ♂, _under side_ (The Sooty Gossamer-wing).
_Butterfly._--Dark gray on the upper side in both sexes. On the under side the figure in the plate gives a correct representation of the color and markings. Expanse, 1.10 inch.
The species occurs in northern California, Utah, Nevada, Oregon, and Washington.
(2) =Lycæna heteronea=, Boisduval, Plate XXXI, Fig. 13, ♂; Fig. 14, ♀; Plate XXXII, Fig. 19, ♀, _under side_ (The Varied Blue).
_Butterfly._--On the upper side the male is blue, the female brown. On the under side the wings are white, with faint pale-brown spots on the hind wings and distinct black spots on the fore wings, more numerous than in _L. lycea_, which it closely resembles on the under side. It is the largest species of the genus, and the female reminds us by its markings on the upper side of the females of _Chrysophanus_. Expanse, 1.25-1.40 inch.
_Early Stages._--These await description.
_Heteronea_ ranges from Colorado to California, at suitable elevations among the mountains.
(3) =Lycæna clara=, Henry Edwards, Plate XXX, Fig. 26, ♀ (The Bright Blue).
_Butterfly._--The figure in the plate is that of the type of the female, the only specimen in my collection. Expanse, 1.15 inch.
_Early Stages._--These are entirely unknown.
(4) =Lycæna lycea=, Edwards, Plate XXXII, Fig. 18, ♂, _under side_ (Lycea).
_Butterfly._--The perfect insect is very nearly as large as _L. heteronea_. The male is lilac-blue on the upper side, with the margins dusky. The black spots of the under side do not show through on the upper side, as in _L. heteronea_. The female is dusky, with the wings shot with blue at their bases, more especially on the fore wing. There are no black spots on the upper side of the wings in this sex, as in _L. heteronea_. On the under side the wings are whitish. The spots on this side are well delineated in our figure in Plate XXXII. Expanse, 1.30 inch.