HESPERIOIDEA OF AMERICA 53 



names may apply to the same thing, but in that case callidus has priority. 

 The genitalia resemble those of pacuvius. California, June and July. 



8. THANAOS MARTIALIS 



Nisoniades martialis Scudder, Trans. Chi. Acad. Sci. i, 335, 1869. 



Scudder, Butt. New Eng. n, 1493, 1889. 



Holland, Butterfly Book 335, pi. xlviii, f. 4, 1898. 



New York, west to Colorado and north into Canada; May, July, August. 



Dr. Forbes tells me that eastern specimens of this species have a brassy 

 lustre, but all which I have seen from the middle west were decidedly pur- 

 plish. The unusually bright, contrasting pattern is the most reliable char- 

 acteristic. 



ab. AUSONIUS 

 Niso7iiades ausonius Lint., 23rd Eep. N. Y. St. Cab. Nat. Hist. 166, pi. 7, 



ff, 11, 12, 1872. 

 Scudder, Butt. New Eng. n, 1498, 1889. 



Ausonius lacks the subapical hyaline spots and has the transverse series 

 of dark dashes unusually prominent. It was described from a single speci- 

 men taken at Center, N. Y., on May 12, 1871, and has never been taken 

 since. 



9. THANAOS JUVENALIS 



Eesperia juvenalis Fab., Ent. Syst. in, (i), 339, 1793. 

 Nisoniades juvenis Hbn., Verz. bek. Schmett. 108, 1820. 

 Nisoniades costalis Westw. & Hew., Gen. Diurn. Lep. n, 519, pi. 79, f. 3, 



1852. 

 Nisoniades ennius Scud. & Burg., Proc. Bost. Soc. Nat. Hist, xin, 296, f. 



9, 1870. 

 Scudder, Butt. New Eng. n, 1476, 1889. 

 Holland, Butterfly Book 335, pi. xlviii, f. 11, 1898. 



Wright, Butt. W. Coast 252, pi. xxxn, 462 9, 469 $ (not 9 tristis), 1905. 

 Atlantic coast to Eockies, Gulf to Northern Canada; May to August. 



10. THANAOS PROPERTIUS 



Nisoniades propertius Scud. & Burg., Proc. Bost. Soc. Nat. Hist, xin, 298, 



f. 11, 1870. 

 Nisoniades tibullus Scud. & Burg., op. cit., p. 299, f. 12. 

 Wright, Butt. W. Coast 252, pi. xxxn, f. 463, 1905. 



Texas, Arizona, California and north into Canada; June, July and Au- 

 gust. The abundance of hairy gray vestiture in specimens which have not 

 been badly rubbed is very characteristic. 



10a. race BOBEALIS 

 Tlianaos propertius, var. borealis Cary, Proc. U. S. N. M. xxxi, 455, 1906. 

 Type one male from North Nahanni Eiver, Mackenzie, June 4, 1904. Ap- 

 parently this is a dark race with the pale maculation greatly reduced. 



