DRUMMOND’S MEADOW-MOUSE. 
167 
the sides with the colour of the hack ; upper surface of the tail, dark 
brown ; under side, grayish-white ; feet, dark gray, tinged with rufous. 
DIMENSIONS. 
Inches. Lines. 
Length of head and body, 4 3 
“ head, 1 4 
“ tail, 1 
HABITS. 
The specimen from which our drawing was made is one of those obtained 
by Mr. Drummond, and was deposited by that gentleman in the museum 
of the Zoological Society at London, as well as many others to which we 
have already referred in our work. It was examined and described by Sir 
John Richardson, who mistook the animal for a supposed species found 
in the state of New York, and loosely described by Raffinesque under 
the name of Lemmus noveboracensis, and which we refer to A. Pennsylvanica, 
with which we have compared the description. 
Drummond in regard to the habits of the present animal merely states 
that they are similar to those of Arvicola xanthognatha. 
GEOGRAPHICAL DISTRIBUTION. 
Valleys of the Rocky Mountains. 
GENERAL REMARKS. 
As above mentioned, Sir John Richardson described this animal, 
quoting from Desmarest (Mamm, p. 286), Raffinesque’s description of 
the so-called Lemmus noveboracensis , which appears to apply to one of the 
varieties of Wilson’s Meadow-Mouse ( Arvicola Pennsylvanica), of which we 
possess specimens. 
From an examination of many species, we have arrived at the conclusion 
that no Arvicola found on the Rocky Mountains are identical with any in 
the Atlantic States, and on a comparison of Richardson’s species with 
those referred to by Raffinesque, we determined without much hesitation 
that the present is a new species under an old name, and we have conse- 
quently attached to it the name of its discoverer — Drummond. 
By some oversight this species was not named on our plate as distinct 
from A. Richardsonii, but is easily distinguished by its short tail — the two 
being on the same engraving. 
