266 



BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



S. g. anthonyi. Topotypes of the latter from San Mateo County, 

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

 and upper surface of the tail are blackish, and the hack is strongly 

 suffused with yellowish brown. The subspecies anthoityi, from the 

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



much paler than .V. gris- 

 i'iis ( 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 pelage, a- in 8. 

 arizonesis and other spe- 

 cies of squirrels. In 

 summer S. g. nigripes 

 has blacker feet than 

 either of the other 

 forms, hut in all three 

 the amount of black is 

 least in winter. 



Remarks. — When en- 

 gaged upon his Revision 

 of the Squirrels of Mex- 

 ico and Central Amer- 

 ica, one of the best pa- 

 pers ever written upon 

 American mammals, 

 Mr. Nelson was puzzled 



Fig. 42.— Sciurus griseus anthonyi. San Diego County, - v "- m> interrelations 01 

 California. (Cat. No. 60934, .U.S.N.M.) a, Dorsal view; the present form with 



6, VENTRAL VIEW; C, LATERAL VIEW. , 1 ,1 



typical grtst us mid the 

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

 direct intergrade between griseus of Columbia River Valley and 

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

 California south of San Francisco: hut we have recently reviewed the 

 case together, and Mr. Nelson agrees with me that million)/'/ i< a 



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

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

 sprinkling of gray on toes. Entire absence ion majority of specimens) of light 

 tawny ochraceous at base and posterior surface of cars. 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.- -Coasl region of California south of San Francisco.'* 



