196 THE LOWER PRIMATES 



The species here described is Mycetes seniculus, also known as Alouatta 

 senicukis, the red howling monkey. The red howler has its habitat in Car- 

 tagena and Colombia. It lives in the forests near the Rio Negro but has also 



Courtesy^ American Museum oj Natural History 



FIG. 100. ATELES ATER, THE SPIDER MONKEY, 

 SHOWING PREHENSILE TAIL. 



been described in Brazil. The animal's fore- and hindlimbs are about of equal 

 length, that is, between ten and twelve inches long. The length of the body, 



