ma:\1]mals of thm Mexican boundary. 299 



AMMOSPERMOPHILUS LEUCURUS (Merriam).'' 

 ANTELOPE GROUND-SQUIRREL 



Tinnids lencurm Merriam, Nortli Aineriean Fauna, No. 2, October 30, 1S89, pp. 



19-21 (original description). 

 Sperinopli'dus lencurus, Merriam, Proc. Biol. Soc. Washington, VII, p. 27, April 



13, 1892.— Elliot, Field Col. Mus., Zool. Ser., II, March, 1901, p. SH. 



{" Spennophihis {Ammuspermophilus) leucurus,'^ fig. 18, p. 85.) — Miller an<l 



Rehn, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, December 27, 1901 (Syst. 



Results Study N. Am. Mam. to close of 1900). 

 [Cilellus [Amrnospermophilus)'} leucurus, Trouessart, Cat. Mam. tarn viv. quam 



fossilium, Supl. Fasc. II, Rodentia, 190-4, p. 335.— Elliot, Field Col. Mus., 



Zool. Ser., IV, p. 142 (Mam. Mid. Am). 



Tiipe-localHij. — San Gorgonio Pass, southern California. (Type, 

 skin and skull, No. \\%%^ collection of Dr. C. Hart Merriam.) 



Geographical range. — Sonoran Zone, on the east side of the Coast 

 Range Mountains, on the Mexican Line, and thence northeast along 

 the Colorado River, passing into the subspecies clnuamomeus in the 

 Painted Desert of northeastern Arizona, and interpres in New Mexico 

 and Texas. Not found on the Mexican Border between the Rio 

 Grande of Texas and the Coast Range Mountains of California, its 

 range lying to the northward. 



Description. — About the size of the eastern chipmunk {Tainiax stri- 

 atm). Tail shoi-t and distichous. Length, 'J25 nmi.; tail vertebne, 

 75; hind foot, 31t; head, 45; skull, 4(> l)y 22.5. Mammje, 5 pairs. 

 Color above finely mixed yellowish, vinaceous, and dark brown, much 

 grizzled, grayest on the anterior half of the body, and most vinaceous 

 on the posterior halt' and on the outer surface of the liml)s. There is 

 a broad, white, longitudinal stripe on each side extending from the 

 shoulder to the nunp. Or1)ital ring and under surfaces white. Feet 

 yellowish white. Tail grizzled, vinaceous, and black al)Ove, white 

 below, the lateral hairs once !)roadly ringed with black. Skull 

 with the audital bulhe very large and prominent, the basi-occipital 

 being correspondingly^ reduced in l)reailth. It is very similar to 



«The following subspecies occur near our limits: 



AMMOSPERMOPHILUS LEUCURUS CINNAMOMEUS (Merriam). 



Tdiiihix U'ucurax ciiinatniniu-utt Merriam, North American Fauna, No. 3, Septem- 

 ber 11, 1890, p. 52. (Type-locality, Echo ('liffs, Painted Desert, Coconino 

 County, Arizona. ) 



Spermophlhifi Ifuriirns ciHiianHoiwiis, Bryani', /oc. III, October, 1892, p. 208. 



AMMOSPERMOPHILUS LEUCURUS PENINSULiE (Allen). 



Tami(i/< leueuriiK petiiiiioihc Allex, Bull. Am. IMus. N'at. Hist., V, p. 197, Aug. 18, 

 1893, (Type-locality, San Telmo, Lower California, Mexico). 



[Spermoplnlusi leucurus jjeu'nisulir, Trouessart, Cat. Mam., Pt. 2, 1897, p. 434. 



\^Citellus lenrnrnsl j)ftii)i.<^ul:r, Elliot, Field Col. Mus., Zool. Ser., IV, 1904, p. 143. 

 (Mam. Mid. Am.). 



