J.IAMMALS 01' THE MEXICAN BOUNDARY. 31 5 



OTOSPERMOPHILUS GRAMMURUS (Say). 

 ROOK-SaiTIKKEL; CANYON-SaUIRKEL. 



Srinrus grammurus Sav, Long's Expedition to the Rocky Mountains, II, 1823, 

 p. 72 (original description). 



Spermophilus grammurus, Bachman, Charlesworth's Magazine Nat. Hist., Ill, 

 1839, p. 390.— Baird, Proc. Acad. Nat. Sci. Phila., 1855, p. 334; Mam. N. 

 Amer., 1857, p. 310, pi. i\' (animal); Rep. U. S. and Hex. Bound. Surv., 

 II, PL 2, 1859, p. 38.— Codes, Amer. Nat., I, 1867, p. 360; Proc. Acad. Nat. 

 Sci. Phila., 1867, p. 135.— Merriam, U. S. Geol. Surv. Terr. 6th Ann. Rept., 

 1873, p. 663.— OouEs and Yarrow, Wheeler Surv., V, Zool., 1875, p. 121.— 

 Allen, Bull. Am. Mus. Nat. Hist., Ill, p. 223, No. 2, April 29, 1891 (Presidio 

 County, Texas). — Miller and Rehk, Proc. Bost. Soc. Nat. Hist., XXX, 

 No. 1, Dec. 27, 1901, p. 49. 



Spermophilus {Otospermophilus) grammurus, Elliot, Field Col. Mus., Zool. Ser., 

 II, 1901, fig. 19 (Synop. Mam. N. Am.). 



[GMto {Otospermophilus) variegalus'] grammurus, Elliot, Field Col. Mus., Zool., 

 Ser., IV, 1904, p. 149 (Mam. Mid. Am.). 



Hlm-rrie'-U-da of the Hualapai Indians of northern Arizona. 



La-cd'-nd of the Hopi Indians of northeastern Arizona. Rocky Mountain line- 

 tailed spermophile of authors. 



Type-locality. — Headwaters of the Arkansas Kiver, now within the 

 State of Colorado. 



Geographical range. — Sonoran, Transition, and Lower Boreal zones 

 of the southern interior region; from the upper Rio Grande Valley 

 west to La Osa (Monument No. 140), at the eastern edge of the Western 

 Desert Tract. 



Description. — Size large (larger than the eastern gray squirrel); with 

 large ears, a stout body, and a bushj' tail. Mammse, 5 pairs. Not striped. 

 Color above grayish; below yellowish white. The upper surface is a 

 coarse mixture of black and grayish or brownish white, the hairs ^eing 

 blackish at base and tip and ringed with whitish in the middle portion, 

 the anangernent of the annuli being such as to produce a vermiculate pat- 

 tern. Top of head and ears much mixed with black. Anterior portion 

 of body usually clear grayish; posterior portion more or less washed with 

 yellowish brown. Tail grizzled black and white, the hairs thg-ice banded 

 with blackish and thrice with whitish, the tips being whitish. Feet and 

 chin brownish white. Orbital circle and under surface of body yel- 

 lowish white at surface, plumbeous at base of hairs. Length, 490 mm. ; 

 tail vertebrae, 220; hind foot, 62; ear above crown, 19; ear above notch, 

 25; length of head, 70. Skull, 62 by 37 mm. in greate.st diameters. 



RemarJcH. — The summer pelage is not materially different from that of 

 winter. The winter pelage appears to be worn until near the end of 

 July," though molting begins about the second week of July and con- 

 tinues through August. Only a few individuals have acquired the per- 

 fect summer pelage by August 20, and one female had not completed the 

 change by September 16. This change takes place in masses. In August 



a Females containing young were killed June 14 and 27. 



