MAMMALS OF THE MEXICAN BOTJNDAEY. 



185 



ODOCOILEUS CROOKI (Mearns). 

 CROOK BLACK-TAILED SEER. 



Dorcelaphus croolci Meakns, Proc. U. S. Nat. Mus., XX, p. 408, Dec. 24, 1R07. 



(P. 2 of advance sheet issued Feb. 11, 1807; original description.) 

 OdocoUeus croolci, Milles and Rehn, Proc. Boston Soc. Xat. Hist, XXX, 



No. 1, Dec. 27, 1901, p. 15 (Syst. Results Study N. Am. Mam to close 



of 1900). 

 Cuervo (Cacalote) of the Mexicans. 

 Akw'aka of the Haulapai Indians. 

 Pe-ash -Book-t»e-ga of the Ilopi Indians. 



Type-locality. — Summit of the Dog Mountains, Grant County, Ne-^^' 

 Mexico. Altitude, 1868 meters (6,129 fet). (Type, No. fffH, U. S. 

 National Museum.) i' \ 



Geographical range. — Mountains of western New Mexico and 

 eastern Arizona (Dog Mountains, New Mexico, to Bill Williams 

 Mountain, Arizona). It belongs to the Transition .__. 



zone of the Elevated Central Tract. 



Description. — Adult female (type, killed June 9) 

 in summer pelage: Similar in form to the black- 

 tailed deer of the Columbia River {OdocoUeus co- 

 lumhianus), but much paler and probably smaller, 

 with larger ears. Color reddish fawn, darlcer 

 from black annulations on the baclj, lightening to 

 grayish cinnamon on the sides, and grayish drab on 

 the neck. The legs are cream-buff, except where 

 new clay-colored hair is coming in on the anterior 

 border, the limbs being almost the last part to re- 

 ceive the summer coating. The coloring of the 

 head is very similar to that of the mule deer in 

 corresponding pelage. It has the horseshoe or 

 arrow-mark on the forehead, and other dark 

 markings of the head to correspond; and the ears 

 are relatively almost or quite as large, and as scant- 

 ily coated with hair. The bushy hair around the 

 ihetatarsar gland (fig. 16), which agrees in size and 

 location with that of OdocoUeus columbiamis (Richardson), is sooty 

 at the base,, and white apically. The tail (fig. 17) is colored much 

 as in 0. colurnbianns, but has a longer terminal switch ; upper side and 

 extremity of tail all black, lower side white mesially, and naked toward 

 the base. The pelage of this deer is short and coarse in comparison 

 with that of the white-tailed deer of Virginia or the black-tailed deer 

 of the Columbia River region, and, as would naturally be expected, is 

 not so red as that of the latter. The type contained a fetus the size 

 of a cotton-tail rabbit. The dimensions of this individual, meas- 



r 



f 



Fig. 10. — ODOCOILEUS 

 CROOKI. Metatar- 

 sal GLAND OF TYPE. 

 (Cat. No. 20572, U.S. 

 N.M.) 



