In our plate we have given in Fig. 1 a representation of the upper side of the form called discoidalis, which in the central part of the fore wing is broadly marked with reddish fulvous. In Fig. 2 we have a representation of the under side of typical T. damon. With the help of these figures the student may recognize both forms of the species.
The caterpillar feeds on the red cedar ( Juniperus virginiana). It is double-brooded in the North and triple-brooded in the South. The species ranges from Ontario to Texas over the whole eastern half of the United States.
(14) Thecla simæthis (Drury), [Plate LXXXV], Fig. 3, ♂ under side (The Brown-margined Hair-streak).
Closely resembling in many respects the preceding species, especially on the upper side, but the white band on the hind wings is straight and the outer margins are heavily marked with bright reddish brown. Expanse 0.85-1.00 inch.
This pretty species ranges from Texas well into South America.
(15) Thecla augustus Kirby, [Plate LXXXV], Fig. 4, ♀ (The Brown Elfin).
Brown above, paler below. The fore wings on the lower side are marked by a straight incomplete median band; the hind wings by an irregular curved median band. Back of these lines toward the base both wings are darker brown. Expanse 0.90 inch.
The insect is found in New England, thence northward and westward into the British possessions.
PL. LXXXVI