MAMMALS OF LIBERIA 587 
CERCOPITHECIDAE Baboons, Guenons 
Cercocebus torquatus atys (Audebert). Sooty Mangabey; “Jocko”’ 
Simia atys Audebert, Hist. Nat. Singes et Makis, fam. 4, sec. 2, p. 13, pl. 8, 1799: “Indes orien- 
tales,” but probably West Africa. 
Sooty gray with white eyelids; last lower molar with five cusps; second and third toes united 
for nearly their entire length. Sierra Leone and Liberia. 
Bittikofer writes that these monkeys are only seldom met with and that 
they spend much time on the ground seeking their food. He secured specimens 
at Bavia, Grand Cape Mount, and on the Junk and the Du rivers. Our ex- 
perience was similar for we saw the species perhaps once in the wild state, in 
contrast to the other genera of monkeys that were comparatively common. On 
the other hand it is the species most commonly seen as a pet about the houses 
of the townspeople as well as in the native villages. It seems to be much more 
tractable than the guenons and makes a more interesting and confiding pet, with 
its alert and mischievous ways. One we kept for a while was active and respon- 
sive, and became a general favorite. When standing at attention the long tail 
is held curved forward in an are over the back. <A well-grown one at Monrovia 
was kept tame at a neighboring house, and escaped its youthful owner, whose 
efforts to recapture his pet were the more amusing as the monkey seemed to 
enter into the game, allowing him to come almost within reach and then just 
eluding his hand. The smaller children it delighted to frighten by making sud- 
den mock charges toward them. It was fond of hibiscus blossoms, pulling them 
off and eating the lower part. 
Cercopithecus callitrichus I. Geoffroy. Green Guenon 
Cercopithecus callitrichus I. Geoffroy, Cat. Primates, p. 23, 1851: no locality. 
Hair on cheeks radiating from a point, no white eyebrow band; grizzled black and yellow above 
becoming grayish on forearms and lower legs; cheeks and under parts white; tail grayish yellow 
at base, yellow terminally. Senegambia to the Congo. 
Although this monkey is said to be common in Senegambia and Sierra Leone, 
Liberia is supposed to be its southern limit on the coast. The only record is that 
of Biittikofer who once observed it, at Buluma, where he shot a male close to 
the mission station, while on his second expedition he had a female in captivity 
that he secured on the Junk River and later took to Europe. 
Cercopithecus mona campbelli Waterhouse. Campbell’s Guenon 
Cercopithecus campbelli Waterhouse, Proc. Zool. Soc. London, 1838, p. 61: Sierra Leone. 
A black mark from eye to back of ear; head grizzled yellowish and black becoming more 
reddish over the shoulders; lower back slaty, finely grizzled with yellowish; forearms and feet 
black; tail mixed black and yellow. Sierra Leone and Liberia. 
In his recent review of the described forms, Schwarz considers this ‘a sub- 
species of the Mona Monkey. It is perhaps the commonest species in Liberia, 
occurring in small troops in the high forest, feeding in the tree tops. Usually 
there are one or two old males in the band whose double bark, like a gruff cough, 
