NO. 1488. B UTTERFLIES OF BRITISH AMERICA— CARY. 455 



THORYBES PYLADES (Scudder). 



A common butterfly along- the Smith Portage, Athabaska, but 

 observed nowhere else in the north. Five specimens, Smith Portage 

 and Fort Smith, June 12 to 14, 1903, were taken about mudholes along 

 the trail. 



THANAOS ICELUS Lintner. 



This familiar "skipper" was not uncommon on the Smith Portage, 

 Athabaska, where it was taken with the preceding species. A number 

 were also secured at Fort Resolution late in Jane, and Mr. Preble took 

 two specimens at Fort Norman, June 10, 1904. 



Specimens collected at Fort Simpson, June 26, 188S, by Frederick 

 Bell, have been recorded ])y Doctor Fletcher." 



THANAOS PROPERTIUS var. BOREALIS, new variety. 



Genital armature similar to that of pnqyertim; tip of right piece 

 long and finger-shaped. Wings more heavily clouded with dusky, and 

 light spots reduced to a mininnim; hoary gray on fore wings largely 

 restricted to outer third. Transverse series of four light spots near 

 costal margin on apical portion of primaries small, punctiform, dis- 

 tinct; rest of light spots oksolete. Marginal and submarginal series 

 of spots on under surface of secondaries showing faintl}^ on upper 

 surface. 



One male, mouth North Nahanni River, Mackenzie, June 4, 1904. 

 Edward A. Preble. 



Type.—^o. 9869, U.S.N.M. 



This is a small, dark, boreal varietj^ of the common T. 2^vopertiuf< of 

 the northern Pacitic coast region of the United States, and is based upon 

 a male specimen in fairly good condition. 



THANAOS MARTIALIS (Scudder). 



In his review of Miss Elizabeth Taylor's northern collection, A. G. 

 Butler records this species from the Rapids of the Drowned, Slave 

 River, June 29, 1892.'' 



HESPERIA CiESPITALIS (Boisduval). 



Early in July, 1903, I saw a number of these butterflies on the 

 rocky bank of the Mackenzie River at Fort Providence, but found 

 them exceedingly difiicult to capture. Two fresh examples were 

 taken — Smith Portage, June 12, and Fort Providence, July 5, 1903. 



Although common in Alberta, //. caispitalls has not heretofore been 

 recorded from the Athabaska-Mackenzie region. , , , 



« Ann. Rept. Can. Geol. Surv., Ill (new ser.), Pt. 1, App. IV, (1889), p. 281 B. 

 ''Annals Nat. Hist. (6), XII, 1893, p. 14. 



