_Butterfly._--Uniformly slaty-gray on the upper side of the wings, with the usual oval sex-mark on the fore wing of the male, and a few bluish scales near the anal angle. The ground-color of the wings on the under side is as above, but somewhat paler. A white bar closes the cell of both wings. Both wings are crossed by white lines, much as in _m-album_. The anal angle is marked with black, followed outwardly by a broad patch of iridescent greenish-blue scales. Between the end of the submarginal vein and the first median nervule is a black spot surmounted with carmine, edged inwardly with black; three or four carmine crescents similarly edged, but rapidly diminishing in size, extend as a transverse submarginal band toward the costa. Expanse, 1.25 inch. _Early Stages._--Unknown. _Alcestis_ is found in Texas and Arizona. (10) =Thecla melinus=, Hübner, Plate XXIX, Fig. 31, ♂; Plate XXXII, Fig. 20, ♂; Plate V, Fig. 39, _chrysalis_ (The Common Hair-streak). [Illustration FIG. 130.--Neuration of _Thecla melinus_. (After Scudder.) Typical of subgenus _Uranotes_.] _Butterfly._--Much confusion has arisen from the fact that this insect has received a number of names and has also been confounded with others. Fig. 31 in Plate XXIX represents the insect labeled _humuli_, Harris, in the Edwards collection; Fig. 20 in Plate XXXII represents the insect labeled _melinus_, Hübner. There is a very large series of both in the collection, but a minute comparison fails to reveal any specific difference. _Humuli_ of Harris is the same as _melinus_ of Hübner; and recent authors, I think, are right in sinking the name given by Harris as a synonym. This common little butterfly may easily be recognized by its plain slaty upper surface, adorned by a large black spot, crowned with crimson between the origin of the two tails of the secondaries. Expanse, 1.10-1.20 inch. _Early Stages._--These are in part well known. The caterpillar feeds on the hop-vine. _Melinus_ is found all over temperate North America, and ranges southward into Mexico and Central America at suitable elevations. (11) =Thecla acadica=, Edwards, Plate XXIX, Fig. 15, ♂; Plate V, Fig. 35, _chrysalis_ (The Acadian Hair-streak). _Butterfly._--The male is pale slaty-gray above, with some ill-defined orange spots near the anal angle, the usual oval sex-mark on the fore wing. The female is like the male above; but the orange spots at the anal angle of the hind wings are broader, and in some specimens similar spots appear on the fore wings near the inner angle. On the under side in both sexes the wings are pale wood-brown, adorned by a black bar at the end of the cells, submarginal and median bands of small black spots surrounded with white, and on the secondaries by a submarginal series of red crescents diminishing in size from the anal angle toward the outer angle. Near the anal angle are two black spots separated by a broad patch of bluish-green scales. Expanse, 1.15-1.25 inch.