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ARVICOLA (HESPEROMYS) CAMPESTRIS.— Le Conte. 
New Jersey Field Mouse. 
A. Supra fuscus, subtus cinereo-fuscus. Capite magno, auribus magnis, 
ovalibus, obtusis, pilis brevibus sparse vestitis. 
CHARACTERS. 
Above brown, beneath greyish. Head large ; ears large oval, and thinly 
covered with hair. 
SYNONYME. 
Hesperomys Campestris. — Le Conte, Proc. Acad. Nat. Sci., Pliila., Oct., 1853. 
p. 413. 
DESCRIPTION. 
Hair plumbeous black, above tipped with brown, beneath with cinereous 
brown, darker about the mouth. Head large ; ears large, oval, blunt, 
thinly covered, both within and without, with very short, closely adpressed 
hair. Legs and feet brown. Tail well clothed with tolerably long hair. 
DIMENSIONS. 
* 
Inches. 
Lines. 
Length, 
3 
4 
of head, 
1 
2 
“ tail, 
2 
7 
HABITS. 
“ This species was found in the collection of the Academy 
of Natural 
Sciences, Philadelphia, and labelled Mus Campestris, 
from New Jersey. 
The specimens were preserved in alcohol, and therefore scarcely fit to be 
described ; there was, however, enough to show that they were dilferent 
from any hitherto described animal. ” (Le Conte.) 
