It is to be presumed, that it is this species of monkey which le Maire speaks of. "It is hardly possible to express, says this traveller, the havock these animals make in Senegal, when the rice, millet, and other grains, on which they feed, are ripe. They assemble together in companies of forty or fifty: one of them remains as centinel on a tree, while the rest commit their depredations. As soon as the centinel perceives any person near, he utters a loud cry, as a signal to the rest, who immediately obey and scamper off with their plunder, leaping from tree to tree with prodigious agility. The females, who carry their young clinging to their breasts, retreat in the same manner as the rest, and leap as if they were not incumbered with any burthen." _Distinctive Characters of this Species._ The patas has pouches on each side of his cheeks, and callosities on his posteriors. His tail is as long as both his head and body: the crown of his head is flat. His muzzle, body, and legs, are long. He has black hair on the nose, and a narrow line of the same colour over the eyes, extending the breadth of the face. The hair on the upper parts of his body is of a reddish colour; and that of the lower, as the throat, breast, and belly, of a yellowish hue. There is a variety in this species, with respect to the colour of the line over the eyes, which is black in some, and white in others. They do not make grimaces when they are angry, like other monkeys. They walk on all fours more frequently than erect. They are from a foot and a half to two feet long, from the muzzle to the origin of the tail. The females are subject to a periodical emanation. THE MALBROUCK, AND THE BONNET CHINOIS. Malbrouck (_fig. 204._) is the name of this animal in its native country, Bengal, and Bonnet Chinois (_fig. 207._) is a term given to the long tailed monkey, which has a kind of trencher cap on the crown of the head, like the Chinese bonnets. These two monkeys seem to belong to one species; and this species, though somewhat different from that of the macaque, is nevertheless, so far bordering on it, as to make us doubt whether the macaque, the egret, the malbrouck, and the bonnet chinois, are not merely four varieties, or permanent races of the same species. As these animals do not propagate in our climate, we have not been able to acquire any knowledge respecting the unity or diversity of their species, and therefore are obliged to judge only by the difference of their figures, and other external attributes. The macaque and the egret, appeared to us so similar, that we presumed them to be of one and the same species. It is the same with respect to the malbrouck, and the bonnet chinois; but, as they differ in a greater degree from the two first than between themselves, we thought it best to separate them.