expressed by a low hoarse monotone 'heu,' not so gular or guttural as a growl. Ennui and a desire for company by a whining 'hom.' Invitation, deprecation, entreaty, by a smacking of the lips and a
_-_Fig._3.png)
Fig. 3.—Skull of Macaeus rhesus: ½ diam. (Copied from Anderson, 'An. Zool. Res.')
_-_Fig._4.png)
Fig. 4.—Skull of Macaeus rhesus: ½ diam. (From Anderson.)
display of the incisors into a regular broad grin, accompanied with a subdued grunting chuckle, highly expressive, but not to be rendered on paper. Fear and alarm by a loud harsh shriek, 'kra' or 'kraouk,' which serves also as a warning to the others who may be heedless of danger. Unlike the Presbytes (Semnopitheci) and Gibbons, they have no voice if calling to one another."
The majority of the species are very docile when young. They thrive well, and several of them have bred in confinement. The
