RODENTIA—ARVICOLINAE—ARVICOLA. 551 
I have had several skins of Arvicola exhibited to me as belonging to 4. nasuta, principally 
on account of the sharpness of the nose. This, however, has proved to result from a neglect to 
replace the muscle of the head in stuffing; in none has there been any approach to the short- 
ness of the hind feet described. In hundreds of specimens in alcohol, examined from Massachu- 
setts, Vermont, and New York, I have seen nothing of the kind. 
ARYICOLA ocHRoGASTER, Wagner. North America. 
Arvicola ochrogaster, WacNneR, Suppl. Schreb. III, 1843, 592. : 
Scuinz, Synopsis, II, 1845, 247. 
This species, supposed to have come from America, is of a mixed yellowish brown and black ; beneath light ochry yellow, more 
rusty towards the sides. The middle of the throat is whitish. Tail dark brown above, ochry yellow beneath, the two colors 
sharply defined. Length of the larger of two specimens along the curve of the back, 4.50 inches ; in a straight line, 3.94 ; tail 
vertebrae, 1.08 ; with the hairs, 1.25. 
I have never seen nor heard of any authentic American Arvicola of an ochry yellow beneath. 
ARVICOLA ONEIDA, Dekay. New York. 
Arvicola oneida, Dexar, N. Y. Zool. I, 1842, 88; pl. xxv, fig. 1. 
Ears nearly hidden in the fur. Above, brown or dark mouse color, with a slight mixture of tawny. (In the diagnosis, amber 
brown should probably read umber brown.) Beneath, light blue gray. Feet brownish black. Length of head and body, 3.20 ; 
tail, 1.25 ; fore legs, .40 ; hind legs, .70 (feet?). Fur about .20 long. 
This species, as described by Dekay, presents few appreciable characteristics to distinguish it 
from young specimens belonging to the typeof riparia. Audubon and Bachman are, I suspect, 
in error in referring their 4. fulvus to this animal, probably belonging to Hypudaeus gappert. 
ARVICOLA RICHARDSONI, Dekay. Rocky Mountains of British America. 
Arvicola riparius, (Ord) Ricu. F. B. A. I, 1829, 120. 
Arvicola richardsonii, Drxax, N. Y. Zool. I, 1842, 91. 
Aup. & Bacu. N. Am. Quad. III, 1853, 163; plate cxxxv. 
Ears somewhat concealed by the fur ; tail about the length of the head; thumb armed with a nail ; hind claws longest ; 
incisors very large. Fur on the back about .66 of aninch, not very fine. Color above, dull dusky dark brown; the 
shade nearly uniform. Beneath, blush gray; margin of upper lip, chin, and feet, dull white. Tail, dark brown above 
whitish beneath: these colors separated by an even line. Head and body, 7 inches ; tail, 2. 
This species appear to be well characterized and distinct from A. riparia. By a curious 
coincidence the same name was given to it by Dekay and by Audubon & Bachman, the latter 
authors not aware of what the former had done in the case. 
ARVICOLA RUBRICATUS, Richardson. Behring’s Straits. 
Arvicola rubricatus, Ricuarpson, Zool. of Blossom, 1839, 7. 
Wacener, Suppl. Schreb. III, 1843, 594. 
Aup. & Bacu. N. Am. Quad. III. 1854, 297. 
Size, a little greater than the common mouse. Slate color on the back; belly, ash-colored ; sides, nearly scarlet ; tail, 
rather short. 
This species, were the colors of back and sides transposed, might be reasonably referred to 
the Kamtschatkan Hypudaeus rutilus. The well defined areas of dorsal and lateral colors 
distinguish it from Arvicola occidentalis of Peale, or A. rufidorsum of Baird, 
