326 OUR SEARCH FOR A WILDERNESS. 



have short tails; while the howlers are members of the 

 American family Cebidae. 



They are of a low type of intelligence and will not live 

 long in captivity, being morose and sullen, very unlike other 

 smaller South American primates. The hyoid bones in the 

 throat are enlarged to form a great thin-walled bony 

 drum, which is the chief instrument in the production of 

 their wonderful voice. 



There were two females and a smaller male in this party, 

 but I got no clear sight of the others after I shot the old one. 

 As in the case of the deer, tiny burying beetles began coming 

 within two minutes after the blood of the baboon had been 

 splashed on the leaves. We had walked for ten or fifteen 

 minutes after shooting the monkey when we heard an infan- 

 tile roar from the remaining male. This the old one would 

 never have allowed, so we had an interesting example of the 

 almost immediate usurping of the leadership by a young 

 animal, at the death of presumably its parent. 



Francis had remarkable eyesight, and when he once real- 

 ized that I was interested in small birds and other objects 

 he would silently point out everything in our path. In this 

 way I found a remarkable frog which was so protected by 

 its color and markings that I should never have discovered it 

 by myself. I have mentioned it before as being of good 

 size, earthern brown in color, with a tall, thin leaf-like ridge 

 on the head over each eye and a row of light-grey tubercles 

 like fringe down each side of the body. From the tip of the 

 nose to the tail extended a narrow, pale bluish line and exter- 

 nally there seemed to be almost no differentiation between 

 head and body. 



I heard Red-billed Toucans 81 calling in a high tree and 

 stalking them, succeeded in shooting two, both males, one 

 younger than the other. The coloring of their beaks was 

 wonderfully brilliant and variegated. Their notes were of 



