264 BULLKTIK S6, trlflTEt) STATES l^ATtOiO'AL MTTSEtTM. 



black tipped with white on its sides and terminal third," yellowish on 

 median area of upper surface, and grayish on the corresponding part 

 of the under surface. 



Remarks. — This chickaree was not seen alive, though it is said to 

 occur at times on the Laguna and Cuyamaca Mountains, 15 to 20 

 miles north of the Mexican line in southern California: Skins were 

 brought to Campo, near Monument No. 240, which were said to have 

 been taken at Laguna Grande, about 50 miles farther south, in the 

 mountains of Lower California. Doctor J. A. Allen regards this as a 

 species; Mr. Nelson as a subspecies of Sciurus douglasii. Its rela- 

 tionships can not be finally determined until specimens have been 

 obtained from intermediate localities. 



SnbgeUQS HESFEBOSCIUBUS Nelson (1898). 

 WESTERN GRAY SttTHRRELS. 



Dentition.— 1. i^i; P- lEf; M. ^=22. 



Without ear-tufts ; interpterygoid . fossa shorter than in Parasci- 

 wrws, longer than in Sciurus; premolars,^ ; the anterior upper pre- 

 molar smaller than in Sciurus, larger than in Tamiasciurus; molar 

 teeth unusually robust ; skull similar to that of NeosciKrus, but broad- 

 ened posteriorly and more depressed, with the zygomatic process of 

 squamosal thrown out horizontally, and the zygomatic arch inclined 

 less obliquely upward. 



SCIURUS GRISEUS ANTHONYI (Mearns). 

 ANTHONY GRAY SftTJIRREL. 



Sciurus fossor anthonyi Mearns, Proc. U. S. Nat. Mus., XX, 189S, p. 501 

 (pp. 1, 2 of advance sheet issued March 5, 1897; original description). — 

 Miller and Rehn, Proc. Bost. Soe. Nat. Hist, XXX. No. 1, Dee. 27, 

 1901, p. 300 (Syst. Results Study N. Am. Mam. to close of 1900). 



Sciurus fossor, Allen, Monogr; N. Am. Rodentia, 1877, p. 731 (in small 

 part; only as to No. 3633, from Port Tejoii. southern California). 



Sciurus griseus. Nelson, Proc. Washington Acad. Sei., I, p. 83, Jlay 9, 1898, 

 (part). 



[Sciurus griseus] anthonyi, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 

 57 (Synop. Mam. N. Am.). 



[Sciurus] griseus, Elliot, Field Col. Mus., Zool. Ser., IV, Pt. 1, 1904, p. 130 

 (Mam. Mid. Am.). 



Type-locality. — Campbell's ranch, Laguna Mountains, San Diego 

 County, California. (Type, skin and skull. No. 60928, U.S.N.M.) 



Geographical range. — Transition zone of mountains of the interior 

 of southern and Lower California. 



Description. — Largest of the tree squirrels (Sciuri) on the Mexican 

 Border of the United States. Length, 570 mm. ; tail to end of verte- 

 brae, 290; tail to end of hairs, 370; width of outspread hairs of tail, 



