PRELIMINARY LIST OF THE MAMMALS OF NEW YORK 311 
Type locality. unter mountain (Catskills) Greene co., New York. 
Fanual position. Canadian zone. 
Habitat. Forests. 
Distribution in New York. In New York this animal is found through- 
out the great boreal area in the northern part of the state, and on the 
numerous boreal “islands” south of this region. In many localities on the 
border line between the transition zone and Canadian zone it is found 
associated with the smaller species S. vodans but the two animals never 
intergrade (see AZerrianr’84d, p. 108, and Bangs, 96d, PetOs))e 
Principal records. DeKay: See last species. Merriam: “The northern 
flying squirrel isa common inhabitant of the elevated central area of the 
Adirondacks and is not particularly rare about the outskirts of the region, 
where I have found both varieties nesting in adjoining trees” (’84d, p. 
108). Mearns: “This species was found in spruce woods on the ridge 
of Hunter mountain [Catskills], at the altitude of 3300 feet. Flying 
squirrels are said to be common everywhere in the region. One seen on 
August 7, 1896 near the base of East Kill mountain at 1800 feet altitude 
may have been either the present species or Sciwropterus volans (Linn- 
aeus)” (‘98b, p. 354). : 
I have taken the Canadian flying squirrels at Peterboro, Madison co., 
and at Elizabethtown, Essex co. It is common at each locality. 
Castor canadensis Kuhl American beaver 
1820 Castor canadensis Kuhl, Beitrage zur Zoologie und vergl. Anat. 
p. 64. 
1842 Castor fiber De Kay, Zoology of New York, Mammalia. p. 72. 
1884 Castor fiber canadensis Merriam, Linn. soc. New York. Trans. 
Bs Tie. 
1898 Castor canadensis Mearns, Am. mus. nat. hist. Bul. 9 Sep. 1898. 
WOES Beir 
Type locality. Wudson bay. 
faunal position. Partly on account of the animal’s aquatic habits, and 
partly on account of lack of definite knowledge of its geographic varia- 
tions, it is impossible at present to assign the beaver a satisfactory faunal 
position. Beaver are known to range from the southern part of the 
lower austral zone in the south to the northern edge of the Hudsonian 
zone in the north. Surprising as it may seem there is at present no 
means for determining whether more than one race occurs in this area.” 
a Since this was written, Mr S. N. Rhoads has divided the beaver into two races, a boreal form, 
true Castor canadensis and an austral form, C. canadensis carolinensis. (Trans. Am. philos. soc., 
NS., Septerhber 1898 19: 417-23). 
