NORTH AMERICAN LAND MAMMALS. 339 



Family PETAURISTID^. 

 Genus SCIUROPTERUS F. Cuvier.^ 



1825. Scmropterus F. Cu^^ier, Dents des mammiferes, p. 255 

 (description, pp. 161-162), Type, Sciurus volans Linn^us = 

 Pteromys russicus Tiedemann. 



Subgenus Glaucomys Thomas. 



1908. Glaucomys Thomas, Ann. and Mag. Nat. Hist., ser. 8, 

 vol. 1, p. 5. January, 1908. Type, Mus volans Linnaeus. 



*Sciuropterus alpinus alpinus (Richardson). 



1828. Pteromys aljyinus Richardson, Zool. Journ., vol. 3, p. 519. 

 1897. Sciuropterus alpinus Rhoads, Proc. Acad. Nat. Sci. 



Philadelphia, p. 319. June, 1897. 

 Type Locality. — Rocky Mountains, at the sources of the 



Athabasca and Peace Rivers [probably Smoky River branch]. 



Alberta, Canada. 



*Sciuropteru3 alpinus bangsi Rhoads. 



1897. Sciuropterus alpinus hangsi Rhoads, Proc. Acad. Nat. 



Sci. Philadelphia, p. 321. June, 1897. 

 Type Locality. — Idaho County, Idaho. 



*Sciuropterus alpinus californicus Rhoads. 



1897. Sciuropterus alpinus californicus Rhoads, Proc. Acad. 



Nat. Sci. PhUadelphia, p. 323. June, 1897. 

 Type Locality. — San Bernardino Mountains, California. 



*Sciuropterus alpinus fiiliginosus Rhoads. 



1897. Sciurojderus alpinus fuliginosus Rhoads, Proc. Acad. 



Nat. Sci. Philadelphia, p. 321. June, 1897. 

 Type Locality. — Cascade Mountains, near Martin Station, 



Kittitas County, Washington. 



t*Sciuropterus alpinus klamathensis Merriam. 



1897. Sciuropterus alpinus Mamathensis Merriaji, Proc. Biol. 



Soc. Washington, vol. 11, p. 225. July 15, 1897. 

 Type Locality. — Fort KHamath, lOamath County, Oregon. 

 Altitude, 4,200 feet. 



*Sciuropterus alpinus lascivus Bangs. 



1899. Sciuropterus alpinus lascivus Bangs, Proc. New Eng- 

 land Zool. Club., vol. 1, p. 69. July 31, 1899. 

 Type Locality. — Tallac, El Dorado County, California. 



1 Eastern forms revised by Bangs (Proc. Biol. Soc. Washington, vol. 10, pp. 162-1C6, December 2S, 1S96), 

 Western by Rhoads (Proc. Acad. Nat. Sci. Philadelphia, 1897, pp. 314-327, June, 1S97). The species are 

 here necessarily arranged alphabetically. 



