1874.] 289 [Allen. 



Genus Sciuropterus. 



6. Sciuropterus volucella. 



a. var. volucella. 



"Sciurus volucella Pallas, Nov. Sp. Glir., 351, 353, 359, 1788." 

 Pteromys volucella Desm., Mamm., n, 343, 1822: — Baird, Mam. N. 

 Am., 286, 1857. 

 Hah. North America, south of about the isotherm of 40° F. 



b. var. hudsonius. 



Sciurus hudsonius Gmel., Syst. Nat., I, 153, 1788. 



Pteromys hudsonius Fischer, Synop., 365, 1825. — Baird, Mam. N. 



Am., 288, 1857. 

 Pteromys sabrinus Eich., Zool. Journ., in, 519, 1828. 

 Pteromys alpinus Wagner, Suppl. Schreber's Saugt., in, 230, 1843. 

 Pteromys oregonensis Bachm., Journ. Acad. Nat. Sci. Phila., vn, 101, 

 1839. 

 Hob. Northern North America, north of about the isotherm of 

 40° F. 



Genus Tamias. 



7. Tamias striatus. 



Sciurus striatus Linn., Mus. Adolphi Fred. Regis., i, 8, 1754. 

 Tamias striatus Baird, 11th Rep. Smith. Inst, 55, 1857. — Ibid., 



Mam. N. Am., 272, 1857. 

 "Tamias americanus Kuhl, Beitr. zur Zool., 69, 1820." 

 Sciurus (Tamias) Lysleri Rich., Faun. Bor. Am., i, 181, 1829. 



Hab. Northern Maine to Virginia on the Atlantic Coast; in the 

 interior north to the northern shores of Lakes Superior and Huron ; 

 west to the Missouri River. 



8. Tamias quadrivitatus. 



a. var. quadrivitatus. 



Sciurus quadrivitatus Say, Long's Exped., n, 45, 1823. 



Hab. Rocky Mountains, and westward in the mountain ranges to 

 the Pacific Coast. 



b. var. pallidus. 1 



Tamias quadrivitatus Baird, Mam. N. Am., 297, 1857 (in part only). 



1 The small, pale form, of tlie high, dry plains of the interior. 



PROCEEDINGS B. S. N. H. — VOL. XVI. 19 JUNE, 1874. 



