[ Douroucoulis monkey of Spanish Guinea ].

Aquatint depicting the Douroucoulis monkey of Spanish Guinea. The Night monkeys, also known as the Owl monkeys or Douroucoulis, are the members of the genus Aotus of New World monkeys (monotypic in family Aotidae). They are widely distributed in the forests of Central and South America, from Panama south to Paraguay and northern Argentina. The species that live at higher elevations tend to have thicker fur than the monkeys at sea level.
The genus name means "earless", they have ears, of course, but the external ears are tiny and hard to see. Night monkeys have big brown eyes and therefore have increased ability to be active at night. They are called night monkeys because all species are active at night and are in fact the only truly nocturnal monkeys.
Engraved by Gallina.
From Giulio Ferrario's work Le Costume Ancien et Moderne ou Histoire du gouvernement, de la milice, de la religion, des arts, sciences et usages de tous les peuples anciens et modernes d'après les monuments de l'antiquité et accompagné de dessins analogues au sujet par le Docteur Jules Ferrario. .
Published in Milan by the author between 1816 and 1827.
This aquatint engraved plate was color printed on fine wove paper with additional hand-coloring.