TRAGELAPHIN.E 217 



The races are distinguishable as follows : 



A. Horns shorter and stouter; frontal tuft chocolate 



(reddish fulvous). 



a. General colour deep chestnut or rufous ; 14 or 



15 stripes T. d. derbianus. 



b. General colour paler ; about 10 stripes T. d. gigas. 



B. Horns larger and more slender : frontal tuft 



blackish chestnut T. d. congolanus. 



The typical locality of the so-called Oreas colini is Kitu, 

 Upper Senegal. 



A. Taurotrag-us derbianus derbianus. 



Taurotragus derbianus typicus, Ward, Records of Big Game, ed. 6, 



p. 334, 1910, ed. 7, p. 332, 1914. 

 Taurotragus derbianus derbianus, Rothschild, Ann. Mag. Nat. Hist. 



ser. 8, vol. xii, p. 575, 1913. 



Typical locality Casamance, south of the Gambia. 



General colour deep chestnut or rufous ; white stripes 

 fourteen or fifteen. Fine horns measure from 30 to 42 inches, 

 with a basal girth of from 9 to 14J, and a tip-to- tip interval 

 of from 15^ to 29-J inches. 



1648, 1 (originally 647, c). Frontlet and horns. Gambia ; 

 collected by Mr. T. Whitfield. Cotype. 



Presented by the Earl of Derby, about 1842. 



1648, a (originally 647, a). Frontlet and horns. Same 

 locality and collector. Same history. 



63. 4. 15. 1 (1648, c). Skull, with horns, and skin. 

 Senegal. Presented by F. Winwood Eeade, Esq., 1863. 



63. 4. 15. 2 (1648, d). Skull, with horns. Same locality. 



Same history. 



89. 10. 7. 6. Skull, with horns, and head-skin. Barcote, 

 Upper Gambia. Presented by Dr. Percy Eendall, 1889. 



11. 6. 10. 111. Skull, with horns, and skin, female. 

 Upper Gambia. Presented "by Cf. Fenwick-Owen, Esq., 1911. 



B. Taurotragus derbianus gigas. 



Taurotragus (Boselaphus) oreas, Heuglin, Nova Acta Ac. Cces. Leop.- 

 Car. vol. xxx, p. 19, 1863, Reise Weiss. Nil, p. 319, 1869, nee 

 Antilope oreas, Pallas. 



