Lord "Rothschild o)i Two yieic Races of Oryx. 209 



XIX, — On Two new Races of Ovyx. 

 By Lord RoTHSCHiLD, F.R.S. 



Ori/x gazella blainei, subsp. n. 



Differs from 0. g. gazella in its paler and greyer grouud- 

 colour. There is also in the ground-colour an entire absence 

 of the buffish or creamy suffusion present in 0. g. heisa. 



The black baud running up from the throat to below and 

 between the ears and base of horns is shorter, nairowor, and 

 more square-cut than in either 0. g. gazella or 0. g. heisa. 



Black band from and below eye joined to face-blaze as in 

 0. g. gazella. 



Black of throat more restricted than in O.g. gazella. Ears 

 much whiter than in either 0. g. gazella or 0. g. beisa. 



Black stripe along centre of back as in 0. g. beisa^ but 

 reaches further up hind neck and is continued as in 0. g. ga^ 

 zella over the rump, expanding to root of tail, to which it is 

 joined. Tail wholly black, with very large tuft as in 0. g- ga- 

 zella. Dark flank-band not joined to dark portion of thigh 

 as in 0. g. gazella nor so wide as in the latter. Dark colour 

 on thigh much more restricted than in 0. g. gazella^ the 

 whole front of lower part of thigh being white. 



Black on rump less extended than in 0. g. gazella. 



Hah. Angola. 



Type {S , mounted), British Museum, Natural History, 

 coll. Gilbert Blaine ([)resented Rowland Ward 'Jhustees). 

 (A mounted entire ? , Tring Museum, coll. Gilbert Blaine). 



Oryx gazella subcallotis, subsp. n. 



Differs from (). g. annectens, Holl., in being intermediate 

 between that form and 0. g. callotis in colour and markings 

 and in having ear-tufts or tassels, the latter, however, being 

 smaller than in 0. g. callotis. 



Hah. Country between the ranges of 0. g. callotis and 

 0. g. annectens. 



Type (mounted head), British Museum, Natural History 

 (presented Rowland Ward Trustees). A second head from 

 same source in the Tring Museum. 



The discovciy of these two new forms proves that Ory.i: 

 gazella (Liini.) and Oryx heisa (Rlipp.) are only local forms 

 Ann. <k Mag. N. Hint. Ser. D. Vol. viii. \\ 



