NO. 5 MAMMALS OF PANAMA GOLDMAN 79 



guishes 0. rothschildi from 0. chiriqueiisis of the adjacent main- 

 land. Skulls of the two forms, of comparable ag^e and sex, exhibit 

 close conformity in most characters, but the disparity in size and 

 apparent absence of any trace of intera^radation seems to warrant 

 the use of a specific name for the island animal. 

 Specimens examined : Coiba Island, 3.' 



Genus MAZAMA Rafinesque. Brockets or Forest Deer 

 The forest deer of the genus Mazama are small species with antlers 

 reduced to simple spikes not exceeding half the length of the head. 

 The body is heavy for so small an animal, but the limbs are very 

 slender. The metatarsal gland, usually present in Odocoileus, is 

 absent in this genus. 



MAZAMA SARTORII REPERTICIA Goldman 



Canal Zone Forest Deer ; Cabra de ]\Ionte 



Mazama tenia reperticia Goldm.\n, Smiths. Misc. Coll., Vol. 60, No. 22, p. 2, 

 February 28, 1913. Type from Gatun, Canal Zone, Panama. 



The little forest deer, or brocket, known to natives of the Canal 

 Zone and to Costa Ricans as " cabra de monte," is a smaller animal 

 than the white-tailed deer and the antlers of the male are short 

 unbranched spikes as pointed out in the remarks on the genus. The 

 ears are short and rounded. The tail is white on the under side as 

 in the so-called white-tailed deer, but is not conspicuously shown as 

 in that animal when running away. Unlike the white-tailed deer, 

 which favors the forest borders, or partially cleared areas, the brocket 

 prefers thickets in remote parts of the forest. The small tracks 

 were seen in various places and the Canal Zone subspecies is assumed 

 to be the rather common form inhabiting the unbroken forests, 

 especially of the eastern and northern parts of the republic, but owing 

 to extreme shyness is seldom seen and few examples are available 

 for study. M. s. reperticia differs from M. s. sartorii of Mexico in 

 somewhat larger size and in duller much less rufescent coloration. 

 A richer reddish colored form, M. s. cerasina HoUister, recently 

 described from Talamanca, Costa Rica, may replace Af. s. reperticia 

 in parts of western Panama. In the Middle American brockets the 

 orbital areas and much of the face is rusty reddish ; in Mazania 

 bricenii Thomas and other South American species, aside from other 

 differential characters, the face including the orbital areas is very 

 dark brown or blackish. 



* Collection Amer. Mus. Nat. Hist. 

 6 



