SQUIRRELS OF MEXICO AND CENTRAL AMERICA 85 



thonyi'' in the National Museum, with a large series of typical S. gri- 

 setis from Oregon and Washington, fails to show any character by 

 which they can be satisfactorily separated. The type and some of the 

 topotypes of anthonyi can be matched by specimens taken at the same 

 season in Oregon ; I am obliged therefore to treat anthonyi as synonym 

 of S. griseus. Some specimens from the type region of '• antJionyi^ 

 have the feet intermediate in color \)Q.\.\sqg\\ grisejis and nigripes} 



Specimens examined. — Fifty-two : from many localities in Wash- 

 ington, Oregon, and California. 



OTOSCIURUS subgen. nov. (pL I, fig. 2). 



SCIURUS DURANGI (Thomas). Durango Squirrel. 



Scinrus aberti Thomas, Proc. Zool. Soc. London, 1882, p, 372 ; Allen, 

 Bull. Am. Mus. Nat. Hist., v, p. 28, April, 1893. (Not .S". abcrti\^oo^- 

 house, 1852.) 



Sciurtts aberti dtirangi Thomas, Ann. & Mag. Nat. Hist., 6th ser., xi, pp. 

 49-50, Jan., 1893. 



Type locality. — Ciudad ranch (100 miles west of Durango City, 

 Durango, Mexico. Type no. 82. 3. 20. 16., British Museum. 



Distribution. — Pine forests of Transition and lower border of 

 Boreal zones in Sierra Madre, western Durango and Chihuahua, 

 Mexico (alt. 7000-11,000 feet). 



Characters. — Similar to S. aberti., but mvich less reddish chestnut 

 on back ; sides of nose to eyes usually reddish buffy, feet more or less 

 grizzled gray ; tail much less full, and its lower surface uniformly 

 grizzled gray; ears smaller and narrower; ear tufts in winter long (ab- 

 sent in summer). Pelage soft and full; under furlong. Teats: p. \ 

 a. ^ 1. y. 



Color. — Summer pelage : Upperparts, including top of nose and 

 base of tail, dingy gray, with dark rufous or reddish chestnut along 

 back from shoulders to rump, but not reaching base of tail as in S. 

 aberti \ outside of forelegs rather paler than back; fore feet white or 

 pale gray ; outside of hind legs like flanks ; hind feet uniform 

 grizzled gray like outside of thighs, or gray mottled irregularly with 

 areas of white and sometimes dingy rusty ; a poorly defined black line 

 along flanks separating color of upper and lower parts ; sides of nose 

 (to eyes) sometimes dingy gray suffused with brownish but usually 

 reddish brown ; same color shading fore part and sometimes all of 



'S. fossor nigripes Bryant, Proc. Calif. Acad. Sci., 2d ser., II, pp. 25-26, 

 1889. [Type from coast region south of San Francisco, probably San Mateo or 

 Santa Cruz Co., Calif.] 



