34 APES AND MONKEYS 



haired, and sometimes possessed of a long, black chin beard. 

 They are always marked by their big, heavily haired tails, 

 which are long, but not prehensile. They are often mistaken 

 for howling monkeys. They are difficult to keep alive, 

 seldom live to reach the United States, and for this reason 

 are likely to remain but little known. The most remarkable 

 species is the Black Saki,^ two specimens of which were 

 placed on exhibition in the New York Zoological Park in 1903. 



The Uakari, or Yarkee, Monkeys, of which there are 

 three species, all found in Brazil, have the shortest tails to 

 be found amongst American monkeys. The Bald Yarkee^ 

 of the Upper Amazon is an excellent imitation of the Japanese 

 red-faced monkey, having not only the same stubby tail and 

 long, shaggy hair, but also a red face! Unfortunately this 

 species is one of the rarest in all America. 



The Howlers are rarely seen in captivity, because it 

 seems almost an impossibility for man to find food which they 

 will eat, and which agrees with them. 



Between the two sides of the lower jaw, the Howler pos- 

 sesses a large sound-box of cartilage — a development of the 

 hyoid bone — which gives to the creature's voice a deep res- 

 onance, of a very unusual character. These monkeys de- 

 light to indulge in vocal concerts, and the deep roar of their 

 unearthly voices can be distinguished at a distance of a mile 

 or more. 



In all there are fourteen species of Howling Monkeys. 

 Occasionally young specimens of the Golden Howler are 

 brought from Venezuela and Guiana to New York, but in 



' Pi-the'cia sa-tan'as. ^ U-a-ka'ri-a cal'va. 



