SCIURID^ 91 



redwoods, and in the oaks in the openings among the redwoods. 

 I did not hear the chirring song that is made by most other sub- 

 species, but heard the "bark," a monotonous "quoo" uttered at 

 intervals of two or three seconds. When startled or disturbed 

 this changed to a querulous "queeo." My impression from my 

 brief acquaintance with the Redwood Chipmunk is that they are 

 tame and unsuspicious. I saw them occasionally on the ground. 



Genus Sciuropterus CuviER. (Squirrel — wing.) 

 Upper outHne of skull strongly arched; penultimate pre- 

 molar present ; anteorbital foramen triangular, rather small ; skin 

 of sides loose, extensible between the fore and hind legs to form 

 parachute-like "wings" and extended by a long slender bone ar- 

 ticulated with the carpus and directed backward and outward; 

 tail long, broad, very much flattened ; no cheek pouches ; eyes 

 large ; ears of moderate size, thinly haired ; pelage soft ; size small ; 

 habit crepuscular and nocturnal ; eight mammae. 



Sciuropterus alpinus klamathensis Merriam. 



KLAMATH FLYING SQUIRREL. 



Above dark drab brown, sometimes tinged with pale dull ful- 

 vous brown; under parts pale yellowish buff, the plumbeous un- 

 der fur showing through ; upper surface of tail like back, but 

 somewhat darker, especially toward the end ; under side of tail 

 uniform deep buff; nose and feet pale; cheeks pale yellowish gray. 



Length of type 329 mm. (13 inches) ; tail vertebrae 135 

 (5.45); hind foot 38 (1.50). 



Type locality. Port Klamath, Oregon. 



Southern Oregon and probably northeastern California. 



Dr. Merriam saw a Klying Squirrel on Mount Shasta which 

 he thought was of this subspecies. 



Sciuropterus alpinus californicus Rhoads. 



SAN BERNARDINO FLYING SQUIRREL. 



Similiar to klamathensis ; apparently paler and smaller. 



