SCIUROPTERUS 



Fig. 25. SCIUROPTERUS volans. 

 No. y2S Field Columbian Museum Coll. Nat. siz 



Lower tooth ro\i 

 Enlarged 4 times. 



Upper tooth row. 



Enlarged 4 times. 



Winter Pehigc. Upper parts wood brown, or cinnamon, tinged 

 with yellow: tip of tail sooty ; feet and hands above sooty gray; cheeks 

 gray; black orbital ring; ears dusky. 



Measurements. Total length, 278.6; tail vertebra^, 130.4; hind 

 foot, 37.6. 



a.—macrotis. (Sciuroptenis), Mearns, Proc. U. S. Nat. Mus. Wash., 

 1899. P- 353. figs- I, 2, 3. 



Type locality. Hunter Mountain, Green county, New York. 



Geogr. Distr. Northern border of United States, east of the 

 Great Lakes. 



Gcnl. Char. Smaller than typical .V. sabrinus: ears longer, fur 

 more reddish. 



Color. Similar to 5. sabrinus, but more reddish in general hue. 



Measurements. Total length, 280; tail vertebra;, 125; hind foot, 

 38; ear, 20; from notch, 23.5; skull 37.5, by 22. 



b.silus. (Sciuropterus), Bangs, Proc. Biol. Soc. Wash., 1896, 

 p. 163. 



Type locality. Katis Mountain, White Sulphur Springs, West 

 Virginia. 



Geogr. Distr. Probably the higher southern Alleghanies. 



Genl. Char. Smallest of flying squirrels, similar to S. sabrinus, 

 but darker. 



