Howell — A New Genus and New Races of Flying Squirrels. Ill 



Measurements. — Average of six adults from type locality: Total length, 

 229; tail vertebrae, 104; hind foot, 30.8. Skull (of type): Greatest 

 length, 34; zygomatic breadth, 20.9; mastoidal breadth, 17.2; interorbital 

 breadth, 7.3; length of nasals, 9.2; alveolar length of maxillary tooth- 

 row, 6.3. 



Remarks. — This subspecies bears a close resemblance to both volans and 

 querceti in color but differs from them in characters of the skull. It is 

 known from only a few localities, but apparently occupies the humid 

 portion of eastern Texas and portions of Louisiana. 



Qlaucomys sabrinus canescens subsp. nov. 



Type from Portage la Prairie, Manitoba. Subadult female. No. 

 7663, Field Mus. of Nat. Hist.; collected February 3, 1900, by G. F. 

 Dippie. 



Characters. — Similar to G. s. macrotis, but much paler, with grayer 

 head and larger skull. Compared with sabrinus: Size smaller; upperparts 

 and feet paler ; underparts whiter. 



Measurements. — Average of two specimens from type locality: Total 

 length, 298; tail vertebrae, 140; hind foot, 38. Skull (of type) : Greatest 

 length, 38.8; zygomatic breadth, 22.9; mastoidal breadth, 17.6; inter- 

 orbital breadth, 7.6; length of nasals, 11.2; alveolar length of maxillary 

 toothrow, 7.6. 



Remarks. — This is the palest of the races of sabrinus and is apparently 

 intermediate in size between sabrinus and macrotis. By reason of the 

 small number of specimens available, its range can not be defined with 

 exactness, but probably it occupies the thinly timbered portions of 

 southern Manitoba and eastern North Dakota and may range even farther 

 westward. 



Qlaucomys sabrinus columbiensis subsp. nov. 



Type from Okanagan, British Columbia. Subadult male. No. 94,310, 

 U. S. Nat. Mus. (Biological Survey collection) ; collected May 9, 1898, 

 by Allan Brooks ; original number 1214. 



Characters. — Similar to O. s. klamathensis, but upperparts more vina- 

 ceous and tail much darker; much paler thim oregonensis, both above 

 and below ; very similar to sabrinus, both in color and cranial characters, 

 but soles of hind feet often yellow (as in klamathensis') ; skull similar to 

 that of oregonensis ; smaller than that of klamathensis, with smaller 

 bullae. 



Measurements. — Two specimens (subadult) from Okanagan Lake, B. C, 

 each measured: Total length, 313; tail vertebrae, 143; hind foot, 42. 

 Skull: Average of 4 (adult and subadult) from same locality: Greatest 

 length, 41; zygomatic breadth, 24.4; mastoidal breadth, 19.1; interor- 

 bital breadth, 7.3; length of nasals, 12.7; alveolar length of maxillary 

 toothrow, 7.8. 



