200 STUDIES IN THE GENUS THANAOS 



nent beyond the cell and giving the appearance of a hoary spot. Secondaries 

 light brown with about a dozen small light yellow spots. Underside. 

 Primaries light brown with a row of six spots crossing the wing from the 

 costa to near the inner margin. Secondaries light brown with the yellow 

 spots of the upperside repeated. 



The female is marked in a similar manner and expands from 16 to 18 mm. 



Distribution. — From Northern Canada to Georgia and Florida. 

 Westward to Colorado, Arizona and Washington. 



Records.— Oldh&m, Nova Scotia, VII, 11; Beulah, Manitoba, V, 5; Johns- 

 town and Elmwood, Rhode Island, V, 12 to 17; North Carolina; Georgia, IV, 

 21, (Abbot); Oakland County, Michigan, V, 25 to VI, 6; Southwestern 

 Colorado; Silver Lake, Utah, VII, 15; Cloudcroft, New Mexico, V, 23; 

 Olympia, Washington, V. 



• Thanaos icelus Scudder and Burgess. 



This interesting little specie^ is liable to be confused with brizo 

 and its variety somnus. It is just possible the Florida records 

 were somnus. It averages smaller in size than brizo and the promi- 

 nence of the hoary scales at the end of the disk, between the bands, 

 will usually serve to distinguish it. Scudder says that it is single 

 brooded and appears as early as May 10th in New England. Lint- 

 ner took it abundantly at Centre, New York, from the 9th to the 

 25th of June, his earliest capture being May 25th. 



Thanaos brizo Boisduval and Leconte, Lep. Amer. Sept., 66, 1863. The 



male and female and the underside of the male are figured, also the larva 



and chrysalis. 

 Scudder and Burgess, Proc. Boston Soc. Nat. Hist., xiii, 289, 1870. Figures 



and descriptions of the genitalia. 

 Scudder, Butterflies of the Eastern U. S. and Canada, ii, 1500, 1899. The 



species figured, also various stages and genitalia. 

 Holland, Butterfly Book, p. 332, pi. 45, f. 7, female. (1898). 



