THE HARRIMAX ALASKA EXPEDITION 21 



of the spotti)i^^ and in the large size and relative broad spacinj^of the 

 spots. It differs from bari'ozvensis in smaller size and much greater in- 

 tensity of the fulvous markings. The nose patch is bright ferruginous 

 instead of pale fulvous; the dorsal area fidvous and well defined, 

 and the underside of tail rusty instead of fulvous, with the black 

 border reaching back along the sides [in barroweitsis it hardly extends 

 beyond the tip]. The sides of the face are distinctly ^r«y/i7/ instead 

 of buff^^ and the fur on these parts is much longer and more fluffy, 

 giving the head a very different expression. The dorsal spots are de- 

 cidedly larger and farther apart. 



MICROTUS INNUITUS sp. nov. Innuit Vole. 



Type from St. Lawrence Id., Bering wSea. Skull no. 99373 afb 



U. S. National Museum, Biological Survey Collection. July i3» 



1899. C. Hart Merriam. 



Characters. — External characters unknown. 



Cranial characters. — Skull conspicuously different from any 

 known species. Size large (considerably larger than zi7ialascensis, 

 somewhat larger than abbreviatus from Hall Island, and nearly 

 double the size of operarms from St. Michaels) ; cranium angular 

 and strongly marked by muscular impressions; zygomata heavy and 

 broadly bowed outward, their anterior roots (seen from above) stand- 

 ing outward and forward; the jugals slightly expanded and parallel; 

 braincase large, squarely truncate anteriorly; nasals large, long and 

 cuneate ; rostrum large and massive, with prominent lip at anterior 

 border of antorbital foramen ; incisive foramen constricted posteriorly; 

 audital btdlce large (much larger than in any other known species 

 from the region about Bering Sea) ; incisors produced and strongly 

 protruding ; molars of same size as in abbreviatus ; fn^ with 3 closed 

 triangles; in^ with 4 closed triangles (2 on each side). 



Measurements. — Total length unknown; tail vertebras 43-45 ; hind 

 foot 22-24. Skull (type): basal length 32.5; zygomatic breadth 

 19.5; mastoid breadth 15.5 ; nasals 9 ; molar series 7.2. 



Remarks. — During our brief stop at Northeast Cape on St. Law- 

 rence Island, on the afternoon of July 13, several of these voles were 

 seen but no fresh specimens were secured. The borders of a long 

 slough or series of ponds on the tundra were cut up by an interlacing 

 network of their deeply worn trails and tunnels near which I gathered 

 a pocketful of pellets containing their remains, doubtless dropped by 

 owls or jaegers. From these pellets a dozen more or less perfect 

 skulls and many parts of skeletons were obtained. The skull is easily 



