_Butterfly._--The wings on the upper side are purplish-blue,--pale in the male, darker in the female,--bordered with dusky, more heavily in the female than in the male. The fringes are white, checkered with dusky at the ends of the veins. The female sometimes has the hind wings marked on the upper side with red marginal spots on the inner half of the border. On the under side the wings are pale bluish-gray, marked with a profusion of small black spots, those on the outer margin arranged in two parallel lines, between which, on the hind wings, are red spots. Expanse, 1.00 inch. _Early Stages._--Awaiting description. _Enoptes_ ranges from Washington to Arizona. (21) =Lycæna glaucon=, Edwards, Plate XXX, Fig. 31, ♀, _under side_; Fig. 39, ♂ (The Colorado Blue). _Butterfly._--Purplish-blue, closely resembling the preceding species, but having the black margin of the wings broader than in _L. enoptes_, with the dark crescents of the marginal series on the under side showing through as darker spots in the margins of the hind wings. The female has a band of orange spots on the margins of the secondaries. The two marginal rows of spots on the lower side of the wings are arranged and colored as in the preceding species. Expanse, 1.00 inch. _Early Stages._--Of these we must again confess ignorance. _Glaucon_ ranges from Washington into California, and eastward to Colorado, where it is quite common in the mountain valleys. (22) =Lycæna battoides=, Behr, Plate XXXII, Fig. 11, ♂ (Behr's Blue). _Butterfly._--On the upper side paler blue than the preceding species, with the hind margin tinged with reddish, shining through from below, and small crescentic dark spots. On the under side the wings are smoky-gray, with all the black spots, which are arranged as in the preceding species, greatly enlarged and quadrate, and a broad submarginal border of orange on the hind wings. The female is like the male, but with more orange on the upper side of the hind wings. _Early Stages._--But little is, as yet, known of these. The insect ranges from California and Arizona to Colorado. (23) =Lycæna shasta=, Edwards, Plate XXXI, Fig. 23, ♂; Fig. 24, ♀ (The Shasta Blue). _Butterfly._--The figures in the plate give a fairly good idea of the upper side of this species in both sexes, though the male is not quite so dark a blue as represented. On the under side the wings have the usual black spots, on a dirty-gray ground, and, in addition, on the hind wings there are a number of small marginal spots surmounted by metallic-colored bluish-green scales, somewhat like those found in some species of the genus _Thecla_. Expanse, 1.00 inch. _Early Stages._--So far as I know, these have never been described. My specimens are all from Montana and Nevada. It is also reported from northern California, Oregon, and Kansas, though I question the latter locality. (24) =Lycæna melissa=, Edwards, Plate XXXI, Fig. 25, ♂; Fig. 26, ♀ (The Orange-margined Blue).