Fur brownish red above; white beneath: ears with a pencil of long hairs at the extremity.
Length of the head and body nine inches; of the head two inches one line; of the ears nine lines and a half; of the tail (to the end of the bone) six inches six lines, (to the end of the hair) eight inches six lines.
Head thick, with the cheeks rather flattened; nose prominent ; the upper lip projecting considerably beyond the lower; the first grinder in the upper jaw extremely small, consisting of a single tubercle, and disappearing altogether at a certain age; eyes black, large, and round; ears erect, moderately large, ornamented at the extremity with a tuft or pencil of long hairs: neck short: legs strong and muscular, much longer behind than before; fore feet with four long, deeply divided toes, and a claw in the place of a thumb; hind feet with five toes; claws sharp and strong: tail long and bushy, with the hair spreading out laterally. Colour of the upper parts reddish, or bright chestnut brown, the red tint being deepest on the sides of the head and neck, the shoulders, and the external surface of the legs; lower parts, including the under portion of the neck, breast, abdomen, and inside of the legs, white: tail the colour of the back.
Common in extensive woods, residing and building in trees. Climbs and leaps with great agility. Feeds on buds, acorns, nuts, and other fruits. When at rest, often sits erect, using its fore feet as hands, with its tail turned back over the body. Produces in the Spring from three to four young.