70 Mcrr'nt m. — Descriptions of Six New Ground Squirrels. 



Characters. — Similar to S. mollis, but in summer pelage head and neck 

 to shoulders uniform pinkish buff [of Ridgway's Color Nomenclature]. 



< 'olor. — Sum mi r pelage: Entire head and neck and fore-back to shoulders 

 uniform pinkish-buff, becoming yellowish-buff below ; rest of back vina- 

 ceous-buff slightly mixed with brown; under parts and fore legs and feet 

 buti'y ; hind feet soiled whitish ; tail above and below buffy, grizzled with 

 dark hairs and edged with buffy. 



Cranial characters. — Skull like that of mollis, but braincase broader 

 across mastoids; ascending arms of premaxillse narrower and more 

 pointed ; tooth row shorter. 



Measurements. — Type specimen: Total length 209; tail vertebra? 49; 

 hind foot 32. Average of 9 specimens from Owens Valley, Calif. : Total 

 length 212 ; tail vertebrae 50 ; hind foot 32.4. 



Spermophilus mollis yakimensis subsp. now 



Type from Mabton, Yakima Co., Washington. No. 89331, rT ad., U. S. 

 Nat. Mus., Biological Survey Coll , July 16, 1897. Collected by Walter 

 K. Fisher. Orig. No. 323. 



Characters. — Similar to S. mollis in size and general appearance, but tail 

 slightly shorter; color grayer and less buff}-, but not so gray as fauns. 

 Nasal bones very much longer than in either mollis or canus. 



Color. — Upper parts buffy -gray, finely grizzled with dusky; nose dull 

 rusty fulvous ; cheeks and sides of neck grayish, sometimes suffused with 

 pale buffy-yellowish, but never approaching the strong buffy-ochraceous 

 of mollis; under parts buffy; feet whitish; tail grizzled fulvous as in 

 mollis. 



Cranial characters. — Skull like that of mollis in size and general charac- 

 ters, but nasal bones much longer, passing backward considerably beyond 

 premaxilhe and ending in a wedge-shaped point ; audital bullae more in- 

 Hated below plane of meatus (i. e., less flattened); basioccipital slightly 

 broader ; incisors heavier. 



Measurements. — Type specimen: Total length 215; tail vertebrae 48; 

 hind foot 33. Average of 10 specimens from type locality and adjacent 

 plain: Total length 213; tail vertebrae 46 ; hind foot 34.2. 



Spermophilus mollis canus subsp. now 



Type from Antelope, Wasco Co., Oregon. No. 78681, 9 ad., U. S. Nat. 

 Mus., biological Survey Coll., June 21, 1896. Collected by Vernon Bailey. 

 Original No. 5561. 



Characters. — Similar to S. mollis, but grayer, slightly smaller, with 

 shorter hind feet and decidedly shorter tail ; skull smaller and relatively 

 broader, with much shorter rostrum. 



Color. —Upper parts finely grizzled gray and dusky without buffy suf- 

 fusion; nose dull rusty fulvous; cheeks and sides of neck grayish (not 

 buffy-ochraceous as in mollis) ; thighs dark, with a dull fulvous suffusion 

 very different from the pale buffy-ochraceous of mollis ; under parts buffy 

 or buffy -gray, more or less grizzled with dark hairs on breast and middle 



