2H6 



BULLETIN 56, TJlSriTED STATES NATIONAL MUSEUM. 



S. (J. (iiit]io)n/i. Topot3'pes of the latter from San Mateo Coimt.y, 

 California, are much darker than true S. griscus; the top of the head 

 and upper surface of the tail are blackish, and the back is stronii'ly 

 suffused with yellowish brown. The subspecies anthonyi^ from the 

 mountains of the interior of southern and Lower California, is very 



much paler than ^. qrh- 

 eus (typical) and also 

 smaller. The tawny- 

 ochraceous color at base 

 and posterior surface of 

 ear is present in all 

 three forms in winter 

 and absent from the 

 summer })elage, as in ;S'. 

 arhonesh and other spe- 

 cies of squirrels. In 

 summer S. ij. n'u/ripefi 

 has lilacker feet than 

 either of the other 

 forms, but in all three 

 the amount of l)lack is 

 least in winter. 



Remar/i's. — '\Mien en- 

 gaged ujion his Kevision 

 of the Squirrels of Mex- 

 ico and Central Amer- 

 ica, one of the l)est pa- 

 pers ever written upon 

 Am.erican mammals. 

 Mr.<^ Xelson was puzzled 

 by the interrelations of 

 the present form with 

 typical f/riseus and the 

 subspecies nigripes, and regarded anthonyi as an untenable race and a 

 direct intergrade between griscus of Columbia River Valley and 

 nigripes of the redwood belt in San Mateo County, on the coast of 

 California south of San Francisco.; but we have recently reviewed the 

 case together, and Mr. Xelson agrees with me that anthonyi is a 



darker than *S'. fossor, particularly upper surface of tail. Upper surface of 

 manus, dark gray or black. Upper surface of pes black, sometimes with a 

 sprinkling of gray on toes. Entire al)sence (on majority of specimens) of light 

 tawny ochraceous at base and posterior surface of ears. Dorsal region and 

 scapulars marked by a pale yellowish-brown suffusion extending nearly or 

 quite to the tail. Orbital ring and under surface of body and legs pure white. 

 Habitat. — Coast region of California south of San Francisco." 



Fig. 42.— Sciurt's griseus anthonyi. San Diego County, 

 California. (Cat. No. G09:M, U.S.N. M.) a, Dorsai, view; 

 b, ventral view: c. lateral view. 



