158 CATALOGUE OF UNGULATES 



of yellowish leaden grey, faintly speckled, and often with 

 a tinge of rufous ; under-parts, inner sides of limbs and 

 buttocks, lower surface of tail, chin, throat, lips, a ring 

 round each -ye, and a band round muzzle white; young 

 fully spotted. The case of the numerous forms allied to the 

 true white-tailed deer is very similar to that of the sambar 

 group, so that there is an equal difficulty in deciding whether 

 they should be regarded as species or subspecies ; Brooke 

 was inclined to take the latter view, which is adopted by 

 Pocock. In this extended sense the range of the species 

 will reach from Ontario to Central and South America, with 

 a gradual diminution in the size of the local races from 

 north to south. 



The following is a provisional " key " to the best-known 

 of these races : 



A. Size large ; antlers large and complex. 



a. Skull of moderate length and slenderness. 

 a'. Black on jaw and tail. 



a". Size smaller, colour bright rufous 0. v. virginianus. 



b". Size larger, colour grey 0. v. borealis. 



b'. No black on face and tail. 



b". General colour (including tail) reddish 



brown 0. v. macrourus. 



c". Closely allied to last 0. v. leucurus. 



b. Skull larger and more slender, with longer 



row of cheek-teeth , 0. v. louisiance. 



B. Size small, antlers miniatures of those of 



typical race. 



a. Colour (at all seasons) mingled dark and 



pale brown, tail dark reddish brown tipped 



with cinnamon O. v. osceola. 



b. Colour pale reddish brown, tail black O. v. texanus. 



c. Colour dull fawn, tail reddish brown ., O. v. couesi. 



d. Colour greyish brown, tail grizzled white and 



brown 0. v. baileyi. 



e. Colour speckled foxy red, tail foxy red 0. v. mexicanus. 



f. Colour brown, with fawn tips to hairs, tail O. v. rothschildi 



fawn with black tip and O. v. chiri- 



c. Size small, antlers slightly lyrate with straight ^ uensis - 



beam. 

 a. Metatarsal gland present. 



a'. Colour bright chestnut, tail tawny O. v. truei. 



b'. Colour mixed black and buff, tail cinnamon 0. v. costaricensis. 

 c'. Colour yellowish brown and grey, tail 



dusky 0. v. nemoralis. 



