BATCHELDER: DISTRIBUTION OF MAMMALS. 
189 
Throughout the following summer, that of 1895, there was an 
unusual scarcity of small mammals of almost all species in this part 
of the Adirondacks. For the first nine days of September I trapped 
in the ground where I had first found M. chrotorrhinus. With an 
average of sixty traps in use, I caught altogether only sixteen small 
mammals; of these six were M. chrotorrhinus. 
This locality is in Lat. 44° 9', about twenty miles west of Lake 
Champlain, and is at an elevation of not more than 1,300 feet above 
the sea. The species was originally discovered (by Miller and Bangs 
— Proc. Boston Soc. Nat. Hist., 26, p. 190) on the summit of Mt. 
Washington, N. H. A single individual also was obtained by them 
at Profile Lake, N. H., but Mr. Miller apparently believed the alpine 
conditions of the former place to be the characteristic environment 
of the animal. Above Profile Lake, close to where Mr. Miller’s 
specimen was taken, there rises a steep slope, a talus of large, angular 
rocks, overgrown with sphagnum and ferns, and wooded with a 
mixed growth of rather small trees — in short, except that it was 
drier and warmer, it hardly differed from the Adirondack ground. 
By setting some traps among these rocks I obtained an example of 
M. chrotorrhinus on June 25, 1895, and the one taken by Mr. 
Miller in the low ground a few hundred yards away had doubtless 
wandered from here. Had the spot been cooler and moister, I see 
no reason why it should not have supported a considerable colony of 
these animals. From my experience, as here related, it seems 
probable that the comparatively few representatives of this sj:>ecies 
living on the summit of Mt. Washington are there not because of its 
altitude, but rather in spite of the rigors that it exposes them to; 
that they find among its rocks conditions of shelter, moisture, and 
coolness, which, though not wholly favorable, are yet sufficienttylike 
what I believe to be their favorite habitat, that is, ground such as I 
have found them occupying in the Adirondacks. 
Evotomys gapperi (Vig.). Red-backed Mouse. 
Very little seems to be known of the distribution of this species 
south of the limits of the Canadian zone. Prof. S. F. Baird in 1857 
(Pacific R. R. Rep., 8, p. 521) mentions having received it from 
Middleboro, Massachusetts, the only locality where he knew of its 
occurrence within the United States. Mr. J. A. Allen in his ‘ Cata¬ 
logue of the Mammals of Massachusetts’ (Bull.Mus. Comp. Zodl. 1, 
