ANTILOCAPRID.E 55 



Family Antilocapridae. (American Antelopes.) 

 Horns decickions, hollow, recurved, with a flattened prong- in 

 front ; horn cores bony, not branched, flattened ; orbit close be- 

 neath l)ase of horn; no lachrymal pit; no tarsal or metatarsal 

 glands ; second and fifth toes absent ; interdigital glands present ; 

 cutaneous glands present under each ear, on the rump, on each 

 hip, and behind each hock; gall bladder present; mamnicne four; 

 hairs long, hollow, coarse and brittle: pelage not differing with 

 age, sex or season to any material extent. 



This is one of the smallest families of mammals, consisting 

 O'f but one genus with a single species, though this will probably 

 bear subspecific division. The distribution is North American. 

 Gramnivorous, digitigrade, terrestrial and principally diurnal. 



Dental formula, I, o — 4; C, o — o; P, 3 — 3 ; M, 3 — 3X2=32. 



Genus Antilocapra Ord. (Antelope — Goat.) 

 Body short; ears of moderate length; eyes .very large; 

 hairs on top of neck long, forming a mane. 



Antilocapra americana Ord. 



PRONG-HORN ANTELOPE. 



Horns fully developed in male only, those of the female 

 rudimentary, not much longer than the surrounding hairs; nar- 

 row transverse band between the eyes, top and sides of muzzle and 

 a patch beneath each ear (wanting in the female) brownish or 

 blackish ; edges of upper lip, chin, sides of face, spot behind the 

 ear, a narrow crescent on the upper part of the neck, a triangular 

 patch below this, a large square patch on the rump including the 

 tail, befly and lower half of the sides white; remainder of upper 

 parts and legs russet yellow or yellowish brown; hoofs, and horns 

 except tips, black. 



Length of male about 1500 mm. (59 inches) ; tail vertebrae 

 125 (5) ; height at shoulders 840 (33) ; at hips 940 (37). 



Prong-horn Antelopes formerly ranged over most of the 



