(34) =Thecla affinis=, Edwards, Plate XXX, Fig. 3, ♀, _under side_ (The Green-winged Hair-streak).
_Butterfly._--On the upper side closely resembling the following species. On the under side the wings are uniformly bright green. Expanse, 1.00 inch.
_Early Stages._--These await description.
The types came from Utah. I also have specimens from California.
(35) =Thecla dumetorum=, Boisduval, Plate XXX, Fig. 1, ♂; Fig. 2, ♂, _under side_ (The Green White-spotted Hair-streak).
_Butterfly._--Dark fawn-color above, sometimes tinged externally with reddish. On the under side both wings are green, the primaries having a short straight band of white spots on the outer third, and the secondaries a small white spot on the costa beyond the middle, and two or three conspicuous white spots near the anal angle. Expanse, 1.10 inch.
_Early Stages._--The eggs are laid on the unopened flower-heads of _Hosackia argophylla_. This is all we know of the life-history.
The species ranges from Oregon and California eastward as far as Colorado.
(36) =Thecla læta=, Edwards, Plate XXIX, Fig. 23, ♂; Fig. 24, ♂, _under side_ (The Early Hair-streak).
_Butterfly._--The wings brown, glossed with bright blue above; on the under side pale fawn, with a band of pale-red spots on both wings about the middle, and a few similar spots on the outer and inner margins of the hind wings. Expanse, .75 inch.
_Early Stages._--Only the egg, described and figured by Scudder, is known.
It ranges from Quebec to southern New Jersey, and westward to West Virginia, and has been taken on Mount Graham, in Arizona. It appears in early spring. It is still rare in collections.
(37) =Thecla titus=, Fabricius, Plate XXX, Fig. 10, ♂; Fig. 14, ♂, _under side_; Plate V, Fig. 37, _chrysalis_ (The Coral Hair-streak).
_Butterfly._--Uniformly gray-brown on the upper side. Some specimens of the female have a few red spots at the anal angle of the hind wing. On the under side the wings are colored as on the upper side; but the hind wings have a conspicuous submarginal band of coral-red spots on their outer third. Expanse, 1.30 inch.
_Early Stages._--These have been well described by several authors. The fullest account is given by Scudder. The caterpillar feeds on the leaves of the wild cherry and the wild plum.