_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 the primaries. On either side of the second median nervule, near the outer margin of both wings, are bright orange-red patches, most conspicuous in the female. The hind wings near the anal angle are blackish, margined with a fine white line. On the under side the wings are marked much as in _m-album_, but in the region of the median nervules, midway between their origin and termination, is a rather broad transverse carmine streak, edged inwardly with dark lines. This is largest and most conspicuous in the female sex. Expanse, 1.00-1.15 inch. _Early Stages._--These have been described, in part, by Abbot and Smith and Packard. The caterpillar feeds on oaks. _Favonius_ is found in the Gulf States, and as far north as South Carolina. (7) =Thecla wittfeldi=, Edwards, Plate XXIX, Fig. 19, ♀; Fig. 20, ♂, _under side_ (Wittfeld's Hair-streak). _Butterfly._--The figures in the plate give a correct idea of both the upper and under sides of this insect. It is much darker in ground-color than any of its congeners. Expanse, 1.25-1.35 inch. _Early Stages._--Unknown. The types which are in my possession came from the Indian River district in Florida. (8) =Thecla autolycus=, Edwards, Plate XXIX, Fig. 13, ♀ (The Texas Hair-streak). _Butterfly._--On the upper side resembling _favonius_, but with the orange-red spots on the wings much broader, ranging from the lower radial vein to the submedian in the fore wings. The carmine spots on the under side of the wings are not arranged across the median nervules, as in _favonius_, but are in the vicinity of the anal angle, crowning the black crescents near the inner end of the outer margin. Expanse, 1.15-1.30 inch. _Early Stages._--Unknown. This species is found in Texas, and is also said to have been found in Missouri and Kansas. (9) =Thecla alcestis=, Edwards, Plate XXIX, Fig. 14, ♀ (Alcestis).