102 
APES AND MONKEYS. 
gentle than some of its allies, the French naturalist, Cuvier, observes that “if 
elegance of shape, gracefulness of movement, gentleness and simplicity of character, 
united with penetration and intelligence of expression, can inspire affection or 
make an animal sought after and admired, all these qualities are united in the 
small group of monkeys allied to the mona, itself distinguished not less by the 
variety of its colours than by its temper and disposition ”—a somewhat flattering 
description applicable as a rule only to young individuals of both sexes, and to 
females of all ages, for the adult males are awkward and capricious creatures to 
manage. 
The Diana Monkey ( Cercopithecus diana). 
Before noticing some of the beardless species more nearly allied to the mona, 
we must mention the well-known West African diana monkey, which derives its 
name from the distinct white crescent on the forehead above the eyebrows. Its 
most characteristic feature is, however, the long pointed white beard, so well shown 
in the lower figure of the woodcut on the preceding page; while the white streak 
on the haunches near the root of the tail is also distinctive. 
The general colour of the fur is black, finely speckled with white, thus producing 
a greyish grizzle. In addition to the white beard and the crescent on the forehead, 
the cheeks, the chin, throat, chest, the front of the shoulders, as well as the inside 
of the thighs and the streak across the haunches, are likewise white. On the other 
hand, there is a broad streak down the back of a bay colour, and the same tint also 
prevails on the rump. The face, tail, and the outer sides of the wrists and legs are 
black, as well as the hands and feet. 
All the colours of this animal are sharply defined from one another; and the 
long, narrow, black face, terminating below in the long and pointed beard, and 
surmounted by the crescent above the eyebrows, give it a peculiar and characteristic 
expression. The whole length of the head and body is about 18 inches, while 
the length of the tail reaches to some 24 inches. 
The real name of the diana monkey in its native districts is said to be Roloway 
on the Gold Coast, although Exquima is given as its title on the Congo. In 
disposition it is one of the most gentle and easily tamable of the guenons; but, 
like the greater number of its tribe, its temper is milder in youth than in mature 
age. When young it appreciates caresses, and it nods and grins when pleased; but 
these expressions of feeling are generally abandoned at a later period. 
The Bearded Monkey ( Cercopithecus pogonias), Campbell’s Monkey (C. 
campbelli), The Red-Bellied Monkey (0. erythrogaster), and Wolf’s 
Monkey (0. wolfi). 
We may notice under this collective heading four species of monkeys closely 
allied to the mona, but distinguished both from that species and the diana by the 
absence of any spot or streak of white on the haunches. While the first three 
species are West African, the fourth, which has only recently been described from a 
specimen living in the Zoological Gardens at Dresden, is from West Central Africa. 
The bearded monkey, also known as Erxleben’s monkey, has the fur of the 
