MAMMALS OF THE MEXICAN BOUNDARY, 



221 



branch or prong arising about the midcUo of its height. AMien the 

 horn is about to be cast oli". it becomes loosened and a new one covered 

 with long hairs, which soon disappear, is formed upon the bony core 

 beneath it. The ears are long and i^ointed. Tail short and pointed, 

 densely coated with coarse hair, except on the underside where the 

 hairs are extremely short. (Fig. 32.) The neck has a thick mane of 

 long chestnut-colored hair. Accessory hoofs are wanting. (Fig. 31.) 

 The lachrymal sinuses of the true antelopes are undeveloped; as 

 also are the "■ inguinal pores." or groin sacks found in true antelopes. 



ANTILOCAPRA AMERICANA MEXICANA Merriam. 



MEXICAN PRONG-HORN ANTELOPE. 



AiifHocapra aiiicricana mc.iivana Merriam. Proc. Biol. Soe. \Yashington, 

 XIV, p. 31, Apr. 5, 1901 (original description ) .^Miller and Rehn, 

 rroc. Best. See. Nat. Hist. XXXI, Xo. 3. Aug. 27. 1!X)3. p. 71 (S.vst. 

 Results Study X. Am. Mam. during the years 1901 and 1902.). 

 [Aiitilocapra aiiicricana'\ )ticdicaiia. Elliot. Field Col. Mus., Zool. 8er., 

 IV. Pt. 1. 1904. p. 82. pi. XXXII (Mam. Mid. Am.). 

 An iiJil' of the Hualapai Indians of north-central Arizona. 

 CJiiir-rac' of the Hopi Indians of northeastern Arizona. 



Type-locality. — Sierra en Media, State of Chihuahua. Mexico. 

 Geograjjhical range. — Sonoran and Transition Zones of northern 



Mexico, extending north into the United States, along the Mexican 



border. Its vertical range ex- 

 tends from below sea level (on the 

 Colorado Desert. California >^^500 

 meters (8.250 feet) on San Fran- 

 cisco Mountains. 



Description. — The antelope's col- 

 oring is made up of white and fawn 

 color, with some blackish markings 

 on the head. On the body, the white 

 occupies all of the under surface, 

 and extends to the inner aspect of 

 the limbs, extending well up on the 

 sides of the body, where it forms a 

 rectangular area, between the 

 shoulders and hips. The whole 

 rump is white, with the exception 

 of a narrow median strip of fawn 

 color that usually connects the 

 colored area of the upper side 

 The lips and chin are white, as are 

 nncr surface of ears, besides which 



tlic underside of the neck is bcautifnllv marked with a white cres- 



Flti.SJ.— AXTILOCAPRA AMERICANA MEXICANA 



Tail. a. Upper surface: h, lower sir^ 



FACE. 



of the tail with that of the l)ack. 

 areas on the cheeks, throat, and 



