266 BULLETTN 56, UNlTEt) STATES NATIONAL MxfSEUM. 



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 back is strongly 

 suffused with yellowish brown. The subspecies anthonyi,^ from the 

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



much paler than S. gris- 

 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 pelage, as in S. 

 arizonesis and other spe- 

 cies of squirrels. In 

 summer S. g. nigripes 

 has blacker feet than 

 either of the other 

 forms, but in all three 

 the amount of black is 

 least in Avinter. 



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 piizzled 

 by the interrelations of 

 the present form with 

 typical gnsc'j/s and 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 ; but we have recently reviewed the 

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



FlQ. 42.— SCIURtIS GEISEUS ANTHONYI. SAN DiEGO COUNTY, 



California. (Cat. No. 609;M, U.S.N.M.) a, Dorsal view; 



b, VENTRAL VIEW; C, LATERAL VIEW. 



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 absence (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 C'nlifornia south of San Francisco." 



