DISTRIBUTION.--Forests on the north bank of the Amazons, opposite Olivença,
not passing eastwards of Iça on the Iça river. The exact westward extension
of this species still remains unknown. The young specimen seen at Fonteboa
by Bates, and by him referred to this species, was more probably _B.
calvus_, as we know from the account given by Geoffroy St. Hilaire and
Castelnau, that the young of _B. rubicundus_ resembles in coloration the
adult, and is _not_ paler.
HABITS.--Gregarious and diurnal; living in the high trees, and feeding on
fruits, probably exclusively, the length of its intestines seeming to
indicate that it is more of a vegetarian than its allies.