ARCTOMYS SCIUROPTERUS. 107 



Genl. Char. Size large. Tail long and bushy. Hairs on shoul- 

 ders elongated forming a mantle. 



Color. Above pale j-ellowish brown mixed with black posteriorlw 

 Head black, face and sides of neck grizzled with white and reddish 

 brown: muzzle white, lender parts rusty chestnut; feet and hind legs 

 mixed with yellowish and rusty chestnut. Tail, above rusty chestnut; 

 below with a median black band. 



Measurements. Total length, 670: tail, 18.S; hind foot, 86; ear, 13. 



139. olympus. yArctomys), Merr. , Proc. Acad. Nat. Scien. Phil., 



iSgS, p. 352. 



Type locality. Solduc Trail, Timber line, Olympic Mountains, 

 Washington. 



Geoi^r. Distr. High Mountains, western Washington. 



Genl. Char. Size equal to A. pruinost4S ; color very different. 



Color. Summer Pelage. Upper parts yellow ochraceous; legs 

 and feet dark brown to almost pure black; chin and nose white; dark 

 bar across face between nose and eyes. 



Winter Pelage. General color bluish gray. 



Measurements. Total length, 750; tail vertebra?, 210; hind foot, 

 1 10. 



11. Sub. Fani. Pteromyinae. 



41. Sciuropterus. 



I. ^^; P. '^ M. ^'= 22. 

 i-j- 1— i' 3-3 



Sciuropterus. F. Cuv. Ann. du Mus., 1825, x, p. 126, pi. x. Type 

 Sciurus volans. Linn. 

 Limbs connected by a furred membrane extending outwardl)- 

 from the sides, and supported by a process from the olecranon. 

 Tail depressed, flattened, thick; ears large; pelage of velvet soft- 

 ness. 



140. sabrinus. {Sciurus), Shaw, Gen. Zool., i, iSoi, p. 157. 

 hudsonius, Gmel. (nee. Pall), Syst. Nat., 1788, i, p. 153. 

 acrobates, Schreb. Saugth., 1792, Iv, pi. ccxxU, B. 



Type locality. Severn River, James Bay, Canada. 



Geogr. Distr. Boreal North America, south to northern New 

 York and southern New Hampshire. 



Genl. Char. Largest of eastern flying squirrels; hind foot large; 

 tail broad; summer and winter pelage different; soles of feet furred, 

 pads naked. 



Color. Summer Pelage. Upper parts sooty drab; beneath dirty 

 white; base of hairs plumbeous; tail, beneath yellowish white tinged 

 with sooty drab. 



