SCIUROPTERUS. 125 



b. ScUtrnptevKS sahrimis niakkorikenHis Sornborger. 

 Sciuropterus sabrinus makkovikensis Sornborger, Ottawa Nat., 



XIV, 1900, p. 48. 

 Makkovik Flying Squirrel. 



Type locality. Makkovik, Labrador. 



Geogr. Distr. Labrador. Range unknown. 



Genl. Char. Size large, color dark. 



Color. Similar to 5. sabrinus but darker above, beneath whitish ; 

 tail sooty, basal half darkest. 



Measurements. Total length, ; tail vertebrae, ; hind foot, 



40.5-42. Skull: occipito-nasal length, 35-41.4; Hensel, 27.9-33; zygo- 

 matic width, 21-26.2 ; interorbital constriction, 7.1-8.9 ; length of man- 

 dible, 21-25.9; length of lower molar series, 6.7-8.2. 



c. Sciuropterus sabrinus si Jus (Bangs). 



Sciuropterus silus Bangs, Proc. Biol. Soc. Wash., x, 1896, p. 163. 



Sciuropterus sabrinus silus Elliot, Syn. N. Am. Mamm., F. C. M. 

 Pub., II, 1901, p. 108. Zool. Ser. 

 Pug-nosed Flying Squirrel. 



Type locality. Katis Mountain, White Sulphur Springs, Green- 

 brier County, West Virginia. 



Geogr. Distr. Probably the higher southern Alleghanies. 



243. Sciuropterus yukonensis Osgood. 



Sciuropterus yukonensis Osgood, N. Am. Faun., No. 19, 1900, p. 

 25. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, 

 Suppl., p. 428. Zool. Ser. 

 Yukon Flying Squirrel. 



Type locality. Camp Davidson, Yukon River near Alaska, Canada 

 boundary, Yukon, Canada. 



Geogr. Distr. Possibly from Chilkoot Inlet, Alaska, north to 

 Canada boundary. 



244. Sciuropterus volans (Linnaeus). 



Mus volans Linn., Syst Nat., i, 1758, p. 63; i, 1766, p. 85. {Mus 



nee Sciurus, p. 88.) 

 Sciurus volucella Pallas, Nov. Spec. Quad. Glir., 1778, p. 351. 

 Sciuropterus volans Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 



II, 1901, p. 109, fig. 25. Zool. Ser. Id. Mamm. Middle Amer. 



& W. Indies, F. C. M. Pub., iv, Pt. i, 1904, p. 158, figs. 29, 



XXXIII. Zool. Ser. 

 Common Flying Squirrel. 

 Type locality. Virginia. 



Geogr. Distr. Northern New York and southern New Hampshire 

 south to Florida, west to the plains. 



