62 Osgood Mammals From. Mount McKinley. 



by a richer and more reddish coloration than that of typical miurux, of 

 which specimens in exactly comparable pelage are available.* The tail is 

 even shorter than in miurus and with little or no dark color on the upper 

 side. The slight cranial characters noted above may not prove constant. 

 The form doubtless occurs throughout the higher parts of the Alaskan 

 Range and this is probably the extent of its distribution, for collecting in 

 the mountains near the Yukon River and in the northern Rockies has 

 failed to reveal it or any near relative. 



Since Mr. Sheldon's trapping was chiefly confined to the region above 

 timberline, this was the only species of Mtcrotnx taken. Some or all of the 

 following probably occur at somewhat lower altitudes in the region : J/. 

 operarim, M. drummondl, M. rnordax and M. xaiitJiognathus. 



Fiber spatulatus Osgood. 



MUSKRAT. 



Common about ponds in the less elevated parts of the region. 

 Erethizon epixanthus myops Merriam. 



PORCUPINE. 

 Occurs throughout the timbered part of the region. No specimens. 



Ochotona collar is Nelson. 



COLLARED PIKA. 



Five specimens, three from near the Peters Glacier, taken July 28th, and 

 two from the base of the Muldrow Glacier, taken August 2d. All are typi 

 cal of this species, which doubtless occurs in suitable places on all the high 

 mountains of the interior of Alaska. Mr. Sheldon reports that pikas were 

 abundant in the vicinity of his camps. 



Lepus americanus dalli Merriam. 



CALL VARYING HARE. 



Hares were seen in abundance well down in the timber but no specimens 

 were secured. 



Lynx canadensis (Kerr). 



CANADA LYNX. 



Common where rabbits are to be found. One was killed on the Tanana 

 River but was not preserved as a specimen. 



Canis albus (Sabine). 



NORTHERN WOLF. 



Wolves are abundant, chiefly above timber, where many tracks were 

 found. 



*The Biological Survey series of M. miurus being quite small, specimens from the 

 American Museum of Natural History, kindly loaned by Dr. J. A. Allen, have also been 

 used for comparison. 



