OCT., 1900.] MAMMALS OF THK YUKON REGHON. 89 



fulvou.s, and vevy indistinct collars. They are in the early spring or 

 left-over winter pelage, and agree quite well with specimens in the 

 same pelage collected in the Chigmit Mountains, near Bristol Bay, by 

 C. L. McKay. The type and topotypes of O. collaris are in the 

 summer or post-breeding pelage and present quite a different 

 appearance. 



The species apparently occurs in the high mountains throughout 

 Alaska. It was reported to me from the MacMillan Mountains, the 

 Upper Stewart River, the Upper White, and the Upper Tanana. 

 Fragments of a skull were found in an owl pellet picked up by Dr. 

 Bishop near Windy Arm, Lake Tagish. The present record from 

 White Pass is the most southern one. There is suitable country for 

 it farther south, and it will be interesting to trace its range in this 

 direction. 



Lepus saliens sp. nov. 



Type from Caribou Crossing, between Lake Bennett and Lake Tagish, Northwest 

 Territory, Canada. No. 98956, U. S. Nat. Mus., Biological Survey Collection, $ 

 ad. Collected June 26, 1899, by W. H. Osgood. Original No., 504. 



Characters. — Similar to Lepus hairdi, but more yellowish and less 

 ruddy; dorsal hairs with plumbeous roots; feet nearly white in sum- 

 mer; similar to Z. coluiinihieiisis^ but with greater amount of black in 

 dorsal region; feet much lighter; skull similar in general to that of 

 Lepus a. dalli; audital bulla? very large. 



Color. — Type in wm'n spinng pelage: Upperparts mixed black and 

 yellowish buff, with patches of plumbeous under -fur exposed in places; 

 black hairs predominating on rump and middle of back, forming an 

 ill-defined dorsal stripe; outer edge of thighs, outer side of forelegs 

 and pectoral band buff; ears and head, except sides of nose, buff with 

 black hairs sprinkled through; sides of nose gray; ears margined with 

 white; hairs of fore and hind feet plumbeous at base, rufous in cen- 

 tral part, and broadly white at tips; general appearance of feet white, 

 lightl}^ mixed with rufous; underparts, except pectoral band, white. 



Skull. — Similar to that of dalli but somewhat larger; teeth heavier; 

 nasals long, heavy, and very broad anteriorly; audital bullae very 

 large; palate short; malars rather wide, deeply channeled anteriorly; 

 postorbital and antorbital processes of f rentals well developed. 



Measurements. — Type (measured from dry skin): Total length 395; 

 hind foot 134; ear from crown 74. Skull of type: Occipitonasal 

 length 77; greatest zygomatic breadth 38; length of nasals 33; great- 

 est width of nasals 17; alveolar length of molar series 16. 



Remarks. — The exact relation in which this species stands to ameri- 

 canus^ hairdi.^ and columhiensis is difficult to determine at present. Its 

 light feet point to relationship with haird% while its dark under color 



1 Rhoads, Proc. Acad. Nat. Sci. Phila., 1895, 242-243. 



