Face flesh-coloured, darker round the margins of the mouth, lighter round the eyes; snout, chin, eyebrows, ears, and naked parts of the hands and feet, dark flesh-colour; general colour of the fur over the body ashy-grey, lightly washed with greenish--the hairs being ringed with alternate bars of black and greyish-green; the head, the mane on neck and shoulders, and the front part of the body ashy-grey, washed with greenish; whiskers greyish-white; hind part of body paler than the fore; forearms and legs greyish-black or almost black; under side of body greyish-white; tip of tail darker; callosities and neighbouring nude parts bright scarlet. Length of body, 26 inches; of tail, 15 inches; height, when standing erect, 4 feet; when sitting, 2½ feet. FEMALES AND YOUNG MALES.--Similar to adult males in coloration, but having no mane; the females of the same size as the males. Both sexes possess laryngeal pouches or air-sacs, extending down the neck nearly to the arm-pits, and connecting with the windpipe by a single opening above the larynx. Facial portion of skull proportionately larger than the cranial. Top of skull and forehead flattened; brain-case and front of cerebrum small and intruded on by the orbits; the latter directed forwards and outwards. {274}DISTRIBUTION.--Arabia, from the plains up to 9,000 feet; Abyssinia, and the Soudan. HABITS.--The Arabian Baboon, or "Tartarin," as it is often called, is gregarious like its allies, occurring in troops of from two hundred and fifty to three hundred individuals. When full-grown, they are very bold and ferocious. They feed on fruits, berries, and the tubers of an edible grass; but their chief food consists of insects, and such small animals as they find under stones, or among the rocky cliffs and ravines, where they usually dwell, for they seem to avoid the wooded country.