210 



STUDIES IN THE GENUS THANAOS 



Georgia, III, 25; (M.Hebard);Biscayne Bay, Florida, (Mrs. Slosson) ; Car- 

 bondale, Illinois, IV, 15; Omaha, Nebraska, IV, 3 to IX, 7, except VII, 

 (Leussler) ; Highrolls, New Mexico, VI, 13. 



Thanaos juvenalis Fabr. 



Thanaos propertius Scudder and Burgess, Proc. Bost. Soc. Nat. Hist., 



xiii, 298, 1870 (genitalia). 

 libullus Scudder and Burgess, 1. v., p. 299. 

 Lintner, Papilio, i, 71, 1881. 

 Wright, Butterflies West Coast, pi. 252, pi. 32, fig. 463. 



" Size of N. juvenalis: the primaries more pointed ; the submarginal row of 

 sagittate and black spots is more oblique, being more drawn inwardly 

 toward the base as it approaches the internal margin, whence it follows that, 

 while in juvenalis, of the two subelliptical whitish spots in cell lb, the lower 

 one is as near to the outer margin as that in cell 3; in this species it is always 

 further removed. The hyaline spot in the discal cell is smaller than in N. 

 juvenalis and is much less conspicuous underneath. Of the four costo- 

 apical hyaline spots, 1, 3 and 4 are in line, or 3 is somewhat nearer to the base 

 of the wing; 2 is nearer the apex and is elongated. The thorax and abdo- 

 men are fuscous, instead of umber-brown. In general color it is darker, more 

 approaching N. persius— the black spots not offering so strong a contrast 

 with the ground as in A'', juvenalis: the primaries are nearly covered with 

 bluish hairs, which is perhaps the best characteristic feature of the species." 



This is Professor Lintner's description from the material in the 

 Scudder collection. He says it is very doubtful if the genitalic 



