11 



Humboldt's Monkey. 

 From D. Appleton & Co.'s •' Elements of Zoology, Science Series." 



belong to this group. Five species are known in the genus 

 Pit/iecia, called severally Yarkee, Black Yarkee, 

 Whiskered Yarkee, &c. 



Of the genus Brachyurus, Short-Tailed Monkeys, 

 there are three species, having the tails short and club- 

 shaped ; they are called Red AcARI, White ACARI, and 

 Black and White Acari ; these terms having some local 

 meaning. 



GROUP 6. — Three species of very small, large-eyed 

 monkeys are called Nyctipitheais or NlGHT MONKEYS, 

 being well adapted, like the owl, for seeing in the night. 

 The DOUROUCOULI -{Nyctipitheais trivirgatus Gray) is the 



