264 BULLETIN 56, UNITED STATES NATIONAL MtUSEtTM. 



9 



black lipped 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. L5 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. 



Subgenus HESPEROSCITJRUS Nelson (1898). 

 WESTERN GRAY SQUIRRELS. 



Dentition.— I. j~; P. J=f; M. jp§=22. 



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

 urus, longer than in Sciurus/ premolars,f; the anterior upper pre- 

 molar smaller than in Sciurus, larger than in T amiasciurus ; molar 

 teeth unusually robust : skull similar to that of Neosciurus, 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). 

 ANTH01JY GRAY SQUIRREL. 



Sciurus fossor anthonyi Meabns, Proc. T'. S. Nat. Mus., XX. 189S, p. 501 

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

 Miller and Kkiin. Proc. Bost. Sue Nat. Hist.. XXX. No. 1. Dec 27, 

 1901, |>. .".no (Syst. Results Study X. Am. -Main, to close of 1900). 



Sciurus fossor, Allen, Monogr, X. Am. Rodentia", 1S7T. p. 731 (in small 

 part; only as to Xo. 3633, from Fort Tejon. southern California). 



Sciurus griseus, Nelson, Proc. Washington Acad. Sei., I. p. 83, May it. 1898 

 (part). 



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

 57 (Synop. Mam. X. Am.). 



[Sciurus] griseus, Elliot, Field Col. Mus.. Zool. Ser.. 1 Y. Pt. 1. L904, p. 130 

 (Mam. Mid. Am.). 



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

 County, California. (Type, skin and skull. No. 60928, l.S.X.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 nun.; tail to end of verte- 

 brae, •_".>(); tail to end of hairs. 370; width of outspread hail's of tail. 



