Wings brown glossed with bright blue on the upper side; 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 0.75-0.85 inch.
The species ranges from Quebec to southern New Jersey and westward and southward to West Virginia and Arizona. It is a rare species, and appears in the early spring.
PL. LXXXVII
(20) Thecla dumetorum Boisduval, [Plate LXXXVII], Fig. 1, ♂, under side (The Green White-spotted Hair-streak).
Dark fawn above; on the outer third of the wings often shaded with reddish; on the under side both wings are green, the fore wings with a short band of white spots on the outer third; the hind wings with a white spot on the costa beyond the middle and two or three conspicuous white spots near the anal angle. Expanse 1.10 inch.
The eggs are laid on the buds of Hosackia argophylla. The insect ranges from Oregon and California eastward as far as Colorado.
(21) Thecla behri Edwards, [Plate LXXXVII], Fig. 2, ♂, under side (Behr’s Hair-streak).
On the upper side the wings are broadly reddish fulvous on the disk, with the costa and outer margins of both wings broadly dark brown or black. The under side is accurately shown in our cut, and therefore needs no description. Expanse 1.10 inch.
This species is also found in Oregon and California, and ranges as far east as Colorado.