Genus Thecla 
It is very common in Central America and Mexico; is not 
scarce in the hot parts of the Gulf States; and is even reported as 
having been captured in southern Illinois. It also occurs in Ari¬ 
zona and southern California. 
(4) Thecla m-album, Boisduval and Leconte, Plate XXIX, 
Fig. 10, $ (The White-M Hair-streak). 
Butterfly. — Smaller than the preceding species; on the upper 
side somewhat like it; but the iridescent color at the base of the 
wings is blue, and not so green as in balesus. On the under 
side the wings are quite differently marked. The fore wing is 
crossed by a submarginal and a median line of white, shaded 
with brown, the median line most distinct. This line is contin¬ 
ued upon the hind wings, and near the anal angle is zigzagged, so as 
to present the appearance of an inverted M. Near the outer angle 
of the M-spot is a rounded crimson patch. The anal angle is deep 
black, glossed with iridescent blue. Expanse, 1.35-1.45 inch. 
Early Stages.— All we know of this pretty species is based 
upon the account and drawings of Abbot made in the last century. 
We need better information. According to Abbot, the caterpillar 
feeds on astragalus and different oaks. 
This species has been taken as far north as Jersey City and 
Wisconsin, and ranges southward as far as Venezuela. Its cita¬ 
del is found in the live-oak hummocks of the Gulf States and the 
oak forests on the highlands of Mexico and more southern 
countries. 
(5) Thecla martialis, Herrich-Schaffer, Plate XXX, Fig. 18, 
?, under side (The Martial Hair-streak). 
Butterfly.— The insect figured in the plate, which may easily 
be recognized by its under side, has been determined by Dr. 
Skinner to be the above species. My specimens coming from 
the Edwards collection are labeled Thecla acis , $. They were 
taken at Key West. A comparison with the under side of T. 
acis (see Plate XXIX, Fig. 38) will reveal the great difference. 
Expanse, 1.00 inch. 
Early Stages. — Unknown. 
Habitat, southern Florida and Cuba. 
(6) Thecla favonius, Abbot and Smith, Plate XXIX, Fig. 22, 
$ (The Southern Hair-streak). 
Butterfly.— The wings are dusky-brown above, with a small 
pale oval sex-mark in the male near the upper edge of the cell in 
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