PRONGHORN 



killed from a single herd. These bands of Barren Ground 

 Caribou wander about with the seasons in search of food and 

 this species is more gregarious in habit than the Woodland 

 species. 



The Caribou which are found in the northern Rockies are 

 the largest of the genus and some of these mountain forms 

 have enormous antlers which are much prized as trophies by 

 the sportsman. 



Family Antilocapridae. Pronghorn 



Horned ungulates of medium size ; both sexes bearing decidu- 

 ous horns on permanent bony cores; horns branched but cores 

 simple; orbit just below base of horn; lachrymal pit, tarsal, 

 and metatarsal glands absent; glands between digits; cutane- 

 ous glands present under ear, on hip, rump and back of 

 hock; mammse four; pelage long, coarse and brittle. 



Genus Antilocapra 



Dentition: Incisors, f ; Canines, g; Premolars, f ; Molars, f =32. 



Pronghorn. — Antilocapra americana 



and related subspecies 



Names. — Pronghorn; Pronghorn Antelope; American 

 Pronghorn ; American Antelope ; Antelope. Plate XLI. 



General Description. — A rather small ungulate, with horns 

 (worn by both sexes) slightly curved and simple in character, 

 carrying one lateral prong. Horns deciduous and shed an- 

 nually, the new horns forming on the permanent bony cores; 

 hair light and peculiar in structure, the individual hair being 

 pith-like in texture with large air-content; form of animal 

 light and graceful, a cursorial, plains type; tail rather short; 

 color pattern light and with rump patch capable of "flash- 

 ing ' ' ; ears large and pointed. 



Color. — Sexes colored almost alike; seasonal variation not 

 very conspicuous. 



Upperparts.' — Rich reddish brown or tan with darker brown 

 to blackish on mane which runs along neck; yellowish white 

 to whitish on rump, lower sides, sides of head, and base of 

 ear ; muzzle and a patch under ear dark brown to black. 



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