THE SAKI MONKEYS 



173 



Most of the sakis are characterized by having long hair on the crown of the 

 head, which may either be divided in the middle line, or may radiate from the cen- 

 tre ; and they all have whiskers and a beard, the latter being either broad and 

 single or separated by a division in the middle, and inclining back on either side. 

 While in some species, like Humboldt's saki, the long hair covers the head, body, 

 and tail, in others this long hair is confined to the head, where it may be present on 

 the crown, cheeks, and chin, or only on the two latter. 



THE WHITE-HEADED SAKI. 



(One-fourth natural size.) 



The headquarters of the sakis appear to be Guiana and the valley of the 

 Amazon, although they are also found in other districts. Mr. Bates speaks of them 

 as being delicate animals, difficult to keep in captivity. They are described as being 

 gentle and inoffensive in disposition when in confinement, but we know very little 

 of their habits in the wild state, although it appears that they are normally silent. 



