Miller.] 190 [Feb. 7, 
ison ill size c;in be inude with S. americanus canadensis. As 
compared with the length of hccad and body, the tail vertel)iae in 
S. americanus arcticus average about 25 mm. less ; while in S. 
americanus canadensis the tail' vertebrae ex'ceed the length of 
head and body by about ten millimeters. 
14. Arvicola kiparitjs Ord. 
An adult male and two nearly full-grown young taken in the 
Alpine Garden, Mt. Washington, July 9 and 10, 1893. These 
specimens do not differ appreciably from those taken at lower 
altitudes in various parts of the eastern United States. 
We observed the species at Franconia, and Mr. BoUes reported 
it common at Chocorua. 
15. Akvicola chrotorrhinds^ sp. nov. 
Specific characters : slightly smaller than Arvicola rlparius Ord, with 
broader hind feet; in color most like Arvicola xanthognathus Leach, but 
decidedly grayer, and with ochraceous patches on muzzle less strongly 
marked. General shape of skull much as in Evotoimjs gapperi (Vigors) ; 
pattern of enamel folding as in Arvicola xanthognatMis Leach, but poste- 
rior upper molar with three closed or nearly closed outer triangles. 
Adult (Type ? skin and skull, No. 2522 collection of Gerrit S. Miller, 
Jr., Mount Washington, N. H., July 14, 1893; taken near the head of 
Tackerman's Ravine at about 5,300 ft. altitude) : length, 1G5 ; tail verte- 
brae, 45; hind foot, 19.4; ear, 13.8; back and sides brown of a shade 
intermediate between raw umber and broccoli-brown, the fur every- 
where sprinkled with black-tipped hairs, these slightly less numerous 
on the sides; area from muzzle to and surrounding roots of whiskers 
tawny ochraceous in strong contrast with the adjacent parts, a faint 
tinge of the same color sufl'iising the whole head and sides of the neck ; 
belly silvery gray,- the bases of the hairs here as elsewhere l)lackish slate, 
the dark color showing through to a slight extent ; tall sepia dorsally, 
hair brown ventrally; dorsum of manus and pes silvery gray; soles 
thickly clothed from heel to proximal tubercle with flue grayish hairs. 
The five adults of Arvicola chrotorrhinus show remarkably little 
individual variation in color. One {^ No. 2523) is slightly 
darker than the type, and is faintly tinged with fulvous about the 
base of the tail. Another ( 9 No. 2520) has the toes and the 
tip of the tail white. The ochraceous nose patches are slightly 
more marked in some individuals than in others, but are very 
evident in all 
' XP'^' XP"'''°s, color, pi's, pivo's, nose. 
" Kidgway, Noineiiclatiue of colors, pi. 2, no. 10. 
