550 UI S. P. R. R. EXP. AND SURVEYS ZOOLOGY GENERAL REPORT. 



Audubon & Bachman first quoted their species as probably coming from Illinois. In the North 

 American Quadrupeds, however, they speak of receiving their specimen from Mr. Fothergill, 

 who obtained most of his animals (and very probably this one) in St. Lawrence county, New 

 York. Should the species of Dekay and of Audubon & Bachman be the same, the name of 

 the former must be retained. 



ARVICOLA DRUMMONDII, Aud. & Bach. Rocky Mountains of British possessions. 



.Irrirola noveboracensis, RICH. F. B. A. 1, 1829, 106. 



Hypudaeus noveboracensis, WAGNER, Suppl. Schreb. Ill, 1841, 591. 



Jlrvicola drummondii, Ann & BACH. N Am Quad. Ill, 1853, 166 ; pi cxxxv, (fig. with short tail.) 



Ears projecting slightly from the fur. Tail more than half the length of the head, with scant hairs not concealing the scales. 

 Legs very short ; feet small ; claws weak. Thumb with a nail. Fur coarse ; on the back about eight lines long. Hair above, 

 grayish black with a reddish brown subterminal annulus, and tipped with black. Prevailing colors above, a mixed dark reddish 

 brown (or dark umber brown in some lights) and black ; baneath, yellowish gray ; arounl the eye, yellowish red, or a rufous spot 

 beneath the ear. Tail above brown, beneath grayish white. Feet dark gray, tinged with rufous. Head and body, 4.25 ; head, 

 1.33. Tail, 1.42, (according to Aud. & Bach, only 1.) Length of feet not given. 



This species is found in the northern Rocky Mountains, in company with A. xanthognathus. 



I had at first been inclined to refer the Arvicola haydeni to this species, but its much darker 

 and redder color, as described, appeared sufficient ground -for distinction. It very possibly 

 belongs to the same section, Pedomys. 



ARVICOLA HIRSUTUS, Emmons. Mass. 



Jlrricola hirsutus, EMMONS, Rep. Quad. Mass. 1840, 60. 



DEKAY, N. Y. Zool. I, 1842, 86 ; pi. xxv, fig 2. 



Above tawny, or reddish brown, intermixed with black tipped hairs ; beneath, ash gray, never white. External ears partly 

 concealed in the hair. 



According to Dekay, the color above is similar to that of the brown rat ; this passes on the belly into slaty gray. Feet dark 

 brown. Tail brownish, lighter beneath. Length of head and body, 5 inches ; of tail, 1.90. 



This species appears to be very similar to A. riparia, to which it is referred by Audubon and 

 Bachman. 



ARVICOLA HTPOLEUCUS, Wagner. Labrador. 



Hypudacus hypoleucus, WAGNER, Wiegmann's Archiv, 1843, II, 142. 



I have not found where, if at all, this species is described. It is only named in the above 

 quotation. The author refers to a notice by Schubert in Miinchner Gelehrte Anzeige, XVIII, 

 417, of Animals of Labrador, where the vernacular name, but no description of the animal, is 

 given. 



ARVICOLA LABRADORA. 



I have seen somewhere a reference to such a species, but cannot find that it is anywhere 

 described. It may possibly refer to the same animal as the preceding. 



ARVICOLA NASUTA, Aud. & Bach. Mass. 



Jrvicola nasuta, ACD. & BACH. J. A. N. Sc. Phila. VIII, H, 1842, 296. IB. N. Am. Quad. Ill, 1853, 211 ; pi. cxliv, 



fig. 2. 



? LECOVTE, Pr. A. N. Sc. Phila. VI, 1853, 407. 



Very large. Tail shorter than the head ; hind feet very short, little more than one-fourth the head. Nose sharper than 

 usual. Color above rusty brown ; the tips of the hairs yellowish brown and black ; beneath soiled yellowish gray ; legs and tail 

 light brown ; chin soiled white. 



Head and body, 5.75 ; head, 1.83 ; tail, 1.17 ; hind foot, .50. 



This species presents a combination of characters in the acute nose, large size, and short tail 

 and feet, I have never seen at all. I can hardly help thinking there must be some mistake in 

 reference to the brevity of the hind feet, so much less in proportion than that of any other 

 known species. 



