2<">2 BULLETIN 56, UNITED STATES NATION \l. MUSEUM. 



A few specimens from the San Francisco and While mountains 

 show a slight tendency to a grayish median area along the lower sur- 

 face of the tail, but it is never so pronounced and conspicuous as in 

 the specimens from the Graham Mountains. In true S. h. mogollon- 

 ensis the basal portions of the hairs of the upper surface of the tail 

 are more or less fulvous, but as a rule they are not at all pronounced. 

 whereas in the Graham Mountains specimens they are conspicuous 

 features. 



"While S. h. grahamensis is apparently not a very strongly dif- 

 ferentiated form, it seems to well warrant recognition, especially 

 when considered in relation to its fairly isolated habitat. While the 

 White Mountains form merely the eastern end of the elevated pine 

 plateau extending westward to the San Francisco Mountains, the 

 Graham Mountains are south of the plateau region, from which they 

 are separated by a comparatively low arid plain. Mr. Price (in 

 letter of October \'2. 18D4) writes: ' Finding Sciurus hudsonius var. \ 

 in the Graham Mountains was interesting'. It could not possibly 

 have come in recent times from the White Mountains, as the dry 

 desert of the Gila River lies between. The Graham Mountains 

 rise abruptly from the plain to about 10,500 feet above sea level, and 

 are very isolated." " (•/. .1. Allen.) 



Dimensions. — Average of three adult specimens, of which the 

 measurements are given by Doctor Atien, in tabular form, in the 

 original description: Length, 332 mm.; tail vertebra), L34; hind fool. 

 55; ear, 28. 



/A marks. — Lieut. Harry C. Benson, writing from Fort Huachuca, 

 Arizona, September 26, 1884, speaks of "squirrels — gray and red 

 (one specimen only seen)." I subsequently heard of a red-backed 

 squirrel that had been shot and skinned in the Huachuca Moun- 

 tains, about 1893, which I thought possibly S. dberti. Both this and 

 Lieutenant Benson's "red" squirrel may have been a form of this 

 chickaree. 



Mr. Edward D. Tuttle, clerk of Graham County, writing from Sol- 

 omonville, Arizona. March 21, L889, says that this squirrel abounds in 

 the mountains of the Graham Range. 



SCIURUS MEARNSI (Townsend). 

 MEARNS CHICKAREE. 



Sciurus hudsOnius mearnsi Townsend, Proe. Biol. Sec Washington, XT. ]>. 

 lit'.. June!). isitT (original description). 



Sciurus hudsonius californicus Allen, Bull. Am. Mus. Nat. Hist.. V. p. 1!»'.>. 

 Aug. is. 1893. ("One specimen, female adult, San Pedro Martir, 

 altitude 8,200 feet, May is. This specimen is in very worn pelage, 

 but as nearly as can be judged is referable as above." Collected by 

 Messrs. E. < '. Thurber and A. \Y. Anthony.) 



Sciurus mearnsi, Allen, Bull. Am. Mus. Nat. Hist.. X. p. 286, July 22, 1808 

 (Revision of the Chickarees or North American Red Squirrels). 



