Genus Thanaos 



(7) Thanaos martialis, Scudder, Plate XLVIII, Fig. 4, $ ; 

 Plate VI, Fig. 37, chrysalis (Martial's Dusky-wing). 



Butterfly. The upper side of the wings is paler than in most 

 species, and has a distinctly purplish-gray cast. The fore wings 

 are crossed by irregular bands of dark spots. The hind wings 

 on the outer half are profusely mottled with small pale spots. 

 All the light spots are repeated on the under side of both wings, 

 and are more distinct on this side than on the upper. Expanse, 

 i. 25-1. 40 inch. 



Early Stages, These are partly known. The caterpillar feeds 

 on Indigofera and Amarantus. 



The species ranges from Massachusetts to Georgia, and west- 

 ward to Missouri and New Mexico. 



(8) Thanaos juvenalis, Fabricius, Plate XLVIII, Fig. n, ? ; 

 Plate VI, Fig. 33, chrysalis (Juvenal's Dusky-wing). 



Butterfly. Larger than the preceding species. The wings 

 have a number of translucent spots arranged as a transverse 

 series beyond the middle of the wing. They are far more dis- 

 tinct and larger in the female than in the male. The under side 

 of the wings is paler than the upper side, and profusely but 

 indistinctly marked with light spots. Expanse, 1.35-1.60 inch. 



Early Stages. For a full knowledge of these the reader may 

 consult the pages of ''The Butterflies of New England." The 

 caterpillar feeds on oaks and leguminous plants of various 

 species. 



This insect ranges from Quebec to Florida, and westward 

 as far as Arizona, where it appears to be common. 



(9) Thanaos petronius, Lintner, Plate XLVIII, Fig. 7, $ (Pe- 

 tronius' Dusky-wing). 



Butterfly. Allied in size to the preceding species, but the 

 translucent spots of the transverse band are not, as in that 

 species, continued toward the inner margin, but terminate at 

 the first median nervule. The outer third of the primaries is 

 pale, the inner two thirds very dark. The under side of the 

 wings of the male is uniformly dusky, slightly, if at all, marked 

 with lighter spots. The under side of the wings of the female 

 is less distinctly marked with light spots than is the case in 

 allied species. Expanse, 1.50-1.75 inch. 



Early Stages. Unknown. 



The species has thus far been found only in Florida. 



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