The capybara is classed with the Cavidae or guinea-pig tribe. When not persecuted, it is very tame; but in the regions frequented by the jaguar it becomes his easy and constant prey. It is of a mild disposition, and is sometimes tamed. Its flesh is rather dry, and has a somewhat musky flavour, but affords wholesome food to man. AGOUTI DASYPROCTA. Of agoutis there are several species. The larger agouti, mara, or Patagonian cony--twice the size of a hare--are seen three or four together, hopping quickly one after the other in a straight line across the Pampas. It is somewhat like a hare, but has the external covering of a hog, its long coat concealing its little stump of a tail. It has also the hog's voracious appetite. It is fond of occupying the burrows of the bizcacha when it finds them, but when they do not exist it is compelled to make a house for itself. It here stores away the food it does not require for present use. When eating, it sits up like the squirrel, using its fore-paws to convey the food to its mouth. Its hind-legs being very long, it leaps over the ground at considerable speed. As it is very fond of the sugar-cane, wherever plantations exist it is hunted without mercy, and driven from the district. The smaller agouti, rather less than a rabbit, generally inhabits forest districts; and as it is there a nocturnal animal, it spends the chief part of the day in its hiding-place--usually the cleft of a rock or the hollow of a decaying tree--twenty or thirty creatures congregating together. Here their nests are formed of soft leaves, where the young are placed till they are able to accompany their parents on their predatory expeditions. It is a gentle little creature, and when caught, instead of attempting to bite, only gives vent to a piteous cry. The larger agouti, or mara, is sometimes classed between the agoutis and the pacas. It is more easily tamed than the smaller species, and the fur is handsomer--of black, white, and golden brown. THE PACA (COELOGENYS). The paca--another rodent--is remarkable for its enormously-developed cheek-bone, and for the thick pouch which it possesses. Like its big relation, the capybara, it always takes up its abode in the neighbourhood of water. It forms a burrow so near the surface, that a person walking over it suddenly steps through. It generally makes three openings, which it covers with dry leaves and branches. The Indian easily discovers the entrances, when he closes up two of the apertures, and watches till the paca ventures out of the third. The little animal, however, defends itself bravely, and will severely bite its assailant. It is of a thick, clumsy form, measuring about two feet in length from the tip of the nose to the extremity of the body, and about one foot in height. The hinder limbs are long, the front ones much bent. Its feet are armed with thick, strong, conical claws, suitable for digging.