60 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Genus SCIUROPTERUS F. Cuvier.^ 
1825. Sciuropterus F. Cuvier, Dents dii maramif^res, p. 255 
(description, pp. 161-162). Type. — Sciurus volans Linnaeus. 
*Sciuropterus alpinus (Richardson). 
1828. Pteromys alpinus Richardson, Zool. joiirn., iii, p. 519. 
1885. 8cmrop)terHs vohicella hudsonius True, Proc. U. S. 
nat. mus., vii (1884), p. 596. 1885. (Part.) 
1897. Sciuro 2 yterus aljnnus Rhoads, Proc. acad. nat. sci. 
Phila., p. 319. June, 1897. 
Type locality. — Rocky Mountains, at the sources of the 
Athabaska and Peace Rivers, Alberta, Canada. 
Sciuropterus alpinus fuliginosus Rhoads. 
1897. jSciuro2)te7'us al 2 nnus fuliginosus Rhoads, Proc. acad. 
nat. sci. Phila., p. 321. June, 1897. 
Type LOCALITY.— Cascade Mountains, near Martin Station, 
Kittitass County, Washington. 
Sciuropterus alpinus lascivus Bangs. 
1899. Sciuropterns alpinus lascivus Bangs, Proc. New Eng¬ 
land zool. club., I, p. 69. July 31, 1900. 
Type locality". — Tallac, El Dorado County, California. 
Sciuropterus alpinus olympicus Elliot. 
1899. 8ciu7'Oj)terus alpinus olympicus Elliot, Field Colum- 
bian mus. publ., i, p. 225. February 1, 1899. 
Type locality". —Happy Lake, Clallam County, Washington. 
Sciuropterus alpinus klamathensis Merriam. 
1897. Sciuro 2 yterus Merriam, Proc. biol. 
soc. Washington, xi, p. 225. July 15, 1897. 
Type locality". — Fort Klamath, Klamath County, Oregon. 
Altitude, 4200 feet. 
1 Eastern forms revised by Bangs (Proc. biol. soc. Washington, x, pp. 162-166, De- 
cember 28, 1896), Western by Rhoads (Proc. acad. nat. sci. Phila., 1897, pp. 314-327, June, 
1897). The species are here necessarily arranged alphabetically. 
