_a3._ Colour yellowish brown; an upper longitudinal white stripe. 120. _T. decula._ _b3._ Colour darker and richer in adult; no upper white stripe. _a4._ White stripes visible in immature and sometimes retained by adult 123. _T. roualeyni._ _b4._ White stripes usually absent in young and always in adult. 122. _T. sylvaticus._ _b1._ Fore leg from base to fetlock on inner side a uniform yellowish brown; hind leg similarly coloured, except for a white patch on front of hock; no stripes or spots on body 124. _T. delamerei._ _b._ Height at withers of adult male over 40 inches; horns 24 inches or more in length, with amber-yellow tips; no white patch at upper end of throat in either sex. _a1._ Tail thickly hairy at sides and end; inner sides of legs below knees and hocks fawn-coloured: adult male slate-grey, with mane of long hairs extending along throat, nape, and sides above belly; females and young chestnut, with white stripes 126. _T. angasi._ _b1._ Tail with tuft of hairs only at tip; inner sides of legs below knees and hocks white in front; adult male without mane and, like the female, chestnut with white stripes 125. _T. eurycerus._ [Illustration: THE BOOK OF ANTELOPES, PL. LXXXVIII. _Wolf del. Smit lith._ _Hanhart imp._ The Decula Antelope. TRAGELAPHUS DECULA. _Published by R. H. Porter._ ] 120. THE DECULA ANTELOPE. TRAGELAPHUS DECULA (Rüpp.). [PLATE LXXXVIII.] _Antilope decula_, =Rüpp.= Neue Wirb. Abyss. p. 11, pl. iv., ♂ ♀ (1838–1840); =Schinz=, Syn. Mamm. ii. p. 427 (1845); =Huet=, Bull. Soc. Acclim. (4) iv. p. 78 (1887). _Calliope decula_, =Rüpp.= Verz. Senck. Mus. iii. pt. 2, p. 182 (1839). _Antilope_ (_Tragelaphus_) _decula_, =Gerv.= Dict. Sci. Nat. Suppl. i. p. 266 (1840); =Less.= N. Tabl. R. A., Mamm. p. 181 (1842); =Reichenb.= Säug. iii. p. 78 (1845); =Gieb.= Säug. p. 311 (1853).