1904.] Allen, Mammals from Alaska. 279 



1728. A single barren female was taken at Muller Bay, 

 where it had its burrow on a hill near the shore. No others 

 were seen on the Alaska Peninsula, nor even signs of any. 

 At Seldovia, where the specimens were obtained from natives, 

 they were said to inhabit rocky hills at the head of the bay 

 on which Seldovia is situated. 



7. Evotomys alascensis Miller. ALASKA RED-BACKED 

 VOLE. Six specimens, Muller Bay, May 31 June 12 



This species differs strikingly from E. dawsoni in its much 

 lighter colors, the red of the back being very much paler and 

 the sides much lighter, the ventral surface pure light gray, 

 and the tail rusty buff all around instead of dusky above. It 

 is about as much lighter than late spring specimens of daw- 

 soni as the late spring pelage of dawsoni is lighter than the 

 late summer pelage of dawsoni. E. alascensis also differs 

 strongly in cranial characters from the dawsoni group. 



The two males measured respectively in the flesh, total 

 length, 144, 146; tail vertebrae, 32, 35; hind foot, 19, 20; 

 ear, 13, 14. The 4 females are srhaller: total length, 137.5 

 (134-140); tail vertebrae, 33 (30-35); hind foot, 19 (18.5- 

 20) ; ear, 12.9 (12-13.5). 



These specimens have been compared with six topotypes 

 of E. alascensis, kindly loaned me by Dr. F. W. True, Head 

 Curator of the Department of Biology, U.S. National Museum. 

 They differ only in the coloration of the ventral surface, 

 which in the Muller Bay (June) specimens is clear ashy white, 

 and in the St. Michaels (October and November) specimens 

 is more or less buffy, a difference clearly due to difference of 

 season. 



This species was apparently rare at Muller Bay, where 

 persistent trapping yielded only six specimens. 



8. Evotomys dawsoni orca (Merriam) . ORCA RED-BACKED 

 VOLE. One hundred and forty-seven specimens, taken as 

 follows: Seldovia, 45, June 27~July 31; Barabori, 8, Aug. 6, 

 8, and 28-30; Sheep Creek, 5, Aug. 21-25 and Sept. 12; 

 Caribou Camp, 7, Sept. 3-9; Moose Camp, 82, Sept. 25-Oct. 



