GENUS THANAOS BOISDUVAL 

 (THE DUSKY-WINGS). 



{I) Thanaos brizo Boisduval & Leconte, Plate CXXXV, 

 Tig. 1, 9 (The Sleepy Dusky-wing) . 



The two rows of light yellow spots on the outer margin of 

 the hind wings appear more distinctly on the under side. 

 Expanse 1.25-1.60 inch- 



Larva feeds on oaks and other plants. Ranges from the 

 Atlantic to the Pacific, from New England to Florida and Ari- 



(2) Thanaos icelus Lintner, Plate CXXXV, Fig. 2, d 1 (The 

 Dreamy Dusky- wing). 



Under side paler than upper, marked with many small, in- 

 distinct yellow spots, not forming well-defined bands as in 

 preceding species. Expanse 1.00-1.20 inch. 



Caterpillar feeds on aspen, oaks, and witch-hazel. Ranges 

 :from Nova Scotia to Oregon, south to Florida and Arizona. 



(3) Thanaos lucilius Lintner, Plate CXXXV, Fig. 3, d" 

 ((Lucilius' Dusky- wing). 



Closely related to preceding, but distinguished by more 



205 



PL. CXXXV 



