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 leaving the genus Tragelaphus to be represented by the larger T. angasi and its relatives. The genus Strepsiceros is represented by the true or great kudu (S. capensis or S. strepsiceros), fig. 2, ranging from the Cape to Somaliland, and the smaller S. imberbis of North-East Africa, which has no throat-fringe. The large and brightly coloured bongo (Boöcercus euryceros) of the equatorial forest-districts serves in some respects to connect the bushbucks with the elands, having horns in both sexes, and a tufted tail, but a brilliant orange coat with vertical white stripes. Still larger are the elands, of which the typical Taurotragus oryx of the Cape is uniformly sandy-coloured, although stripes appear in the more northern T. o. livingstonei, while the black-necked eland (T. derbianus) of Senegambia and the Bahr-el-Ghazal district is a larger and more brilliantly coloured animal. The small horns and bluish-grey colour of the adult bulls serve to distinguish the Indian (q.v.), Boselaphus tragocamelus, from the other members of the subfamily.

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The second group, which is mainly African, but also represented in Syria, is that of the Hippotraginae, typified by the sable antelope (Hippotragus niger) and roan antelope (H. equinus), but also including the oryxes (Oryx) and addax. These are for the most part large antelopes, with long cylindrical horns, which are present in both sexes, hairy muzzles, no face-glands, long tufted tails and tall thick molars of the ox-type. In Hippotragus the stout and thickly ringed horns rise vertically from a ridge above the eyes at an obtuse angle to the plane of the lower part of the face, and then sweep backwards in a bold curve; while there are tufts of long white hairs near the eyes. The sable antelope is a southern species in which both sexes are black or blackish when adult, while the lighter-coloured and larger roan antelope has a much wider distribution. The South African blauwbok (H. leucophaeus) is extinct. In the addax (Addax nasomaculatus), which is a distinct species common to North Africa and Syria, the ringed horns form an open spiral ascending in the plane of the face, and there is long, shaggy, dark hair on the fore-quarters in winter. The various species of oryx differ from Hippotragus by the absence of the white eye-tufts, and by the horns sloping backwards in the plane of the face. In the South African gemsbuck (Oryx gazella), fig. 3, the East African beisa or true oryx (O. beisa), and the white Arabian (O. beatrix) the horns are straight, but in the North African white oryx or algazel (O. leucoryx or O. algazal) they are scimitar-shaped; the colour of this species being white and pale chestnut (see, , and ).

The third subfamily is the Antilopinae, the members of which have a much wider geographical range than either of the foregoing groups. The subfamily is characterized by the narrow crowns of the molars, which are similar to those of sheep, and the hairy muzzle. Generally there are face-glands below the eyes; and the tail is moderate or short. Pits are present in the forehead of the skull, and the horns are ringed for part of their length, with a compressed base; their form being often lyrate, but sometimes spiral. Lateral hoofs are generally present.

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Gazelles (Gazella), which form by far the largest genus of the subfamily, are inhabitants of open and frequently more or less desert districts. They are mostly of a sandy colour, with dark and light markings on the face, and often a dark band on the flanks. The horns are more or less lyrate, and generally developed in both sexes; there are frequently brushes of hair on the knees. Gazelles may be divided into groups. The one to which the North African G. dorcas belongs is characterized by the presence of lyrate or sub-lyrate horns in both sexes, and by the white of the buttocks not extending on to the haunches. Nearly allied is the group including the Indian G. bennetti and the Arabian G. arabica, in which the horns have a somewhat S-shaped curvature in profile. In the group represented by the African G. granti, G. thomsoni, G. mohr, &c., the white of the buttocks often sends a prolongation on to the flanks, the horns are long and the size is large. Lastly, the Central Asian G. gutturosa, G. subgutturosa and G. picticaudata form a group in which the females are hornless and the face-markings inconspicuous or wanting.

The South African springbuck (Antidorcas euchore) is nearly related to the gazelles, from which it is distinguished by the presence on the middle line of the loins of an evertible pouch, lined with long white hairs capable of erection. It has also one premolar tooth less in the lower jaw. Formerly these beautiful antelopes existed in countless numbers on the plains of South Africa, and were in the habit of migrating in droves which completely filled entire valleys. Now they are comparatively rare.

The dibatag or Clarke’s gazelle (Ammodorcas clarkei), of Somaliland, forms a kind of connecting link between the true gazelles and the gerenuk, this being especially shown in the skull. The face has the ordinary gazelle-markings; but the rather short horns—which are wanting in the female—have a peculiar upward and forward curvature, unlike that obtaining in the gazelles