VOL IX, pp. 129-132, PL. 2 JULY 27, 1894 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW FIELD MOUSE (ARVICOLA 



TERR^ENOV^E sp. nov.) FROM CODROY, 



NEWFOUNDLAND. 



BY OUTRAM BANGS. 



Since November, 1893, Mr. Ernest Doane has been collecting 

 mammals for me in Newfoundland. He has so far sent, among 

 other things, a series of over sixty beautifully prepared skins and 

 skulls of an Arvicola that seems to be entirely different from any 

 known species. 



This Arvicola may be defined as follows : 



Arvicola terraenovae sp. nov. 



Diagnosis, 



About the size of Arvicola riparius Ord, but with larger feet, 

 and of a slightly different coloring, especially about the under 

 parts, which are so much lighter and never show the rufous 

 tinge so common in riparius, with nose-patches similar to those 

 of A. xanthognathus Leach and A. chrotorrhiaus Miller, though 

 not so pronounced as in either of those two. Skull rather 

 broader than that of A. riparius and the zygoma more flaring, 

 suggesting the general appearance of the skull of A. xanthognathus. 

 The enamel pattern more like that of riparius, but the posterior 

 loop of the last upper molar trifoliate. 



