(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.
Early Stages.—These await description.
The butterfly is found in the region of the Rocky Mountains, from New Mexico to Montana.
(5) Lycæna fulla, Edwards, Plate XXX, Fig. 24, ♂; Fig. 25, ♁ (Fulla).
Butterfly.—Smaller than the preceding species. The upper side of the male is not lilac-blue, but ultramarine. The female is almost indistinguishable on the upper side from the female of L. lycea. On the under side the wings are pale stone-gray, with a black spot at the end of the cell of the primaries and a large white spot at the end of the cell of the secondaries. The other spots, which are always ringed about with white, are located much as in L. icarioides (see Plate XXX, Fig. 29). Expanse, 1.15-1.20 inch.
Early Stages.—Unknown.
Fulla occurs in northern California, Oregon, Washington, and British Columbia.
(6) Lycæna icarioides, Boisduval (mintha, Edwards), Plate XXX, Fig. 29, ♂, under side (Boisduval's Blue).
Butterfly.—The insect on the upper side closely resembles the preceding species in both sexes. On the under side it may be at once distinguished from the following species by the absence on the margin of the hind wings of the fine black terminal line, and by having only one, not two rows of submarginal black spots. There are other marked and striking differences, and the merging of L. dædalus, Behr, with this species, which has been advocated by some recent writers, is no doubt due to their lack of sufficient and accurately identified material. Expanse, 1.35 inch.