62 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Sciuropterus silus Bangs. 
1896. Sciuropteras silus Bangs, Proc. biol. soc. Washington, 
X, p. 163. December 28, 1896. 
Type LOCALITY. — Top of Katis Mountain, near White Sul¬ 
phur Springs, Greenbrier County, West Virginia. 
Sciuropterus yukonensis Osgood. 
1900. Sciuropterus yukonensis Osgood, North Amer. fauna, 
no. 19, p. 25. October 6, 1900. 
Type locality. — Gamp Davidson, Yukon River, near Alaska- 
Canada boundary, Yukon, Canada. 
* Sciuropterus volans (Linnaeus). 
1758. volans Linnaeus, Syst. nat., x ed., i, p. 63. 
1885. Sciuropterus volucella volucella True, Proc. U. S. nat. 
mus., VII (1884), p. 596. 1885. (Part.) 
1890. S\_ciuro 2 :)terus'\ volans Jordan, Manual of the vertebrate 
animals of the northern United States, 5th ed., p. 321. 
Type locality. — Virginia (see Bangs, Proc. biol. soc. Wash¬ 
ington, X, p. 165, December 28, 1896). 
Sciuropterus volans querceti Bangs. 
1896. Sciuropterus volans querceti Bangs, Proc. biol. soc. 
Washington, x, p. 166. December 28, 1896. 
Type localitit. — Citronelle, Citrus County, Florida. 
Family CASTORIDAE. 
Genus CASTOR Linnaeus. 
1758. Castor Linnaeus, Syst. nat., x ed., i, p. 58. Type.— 
Castor fiber Linnaeus. 
* Castor canadensis Kuhl.i 
1820. Castor canadensis Kuhl, Beitrage z. Zoologie, p. 64. 
1 Reviewed by Rhoads in Trans. Amer. philos. soc., n. s., xix, pp . 417-439, Septem¬ 
ber, 1898. 
