SLAVE-MAKING ANTS. 57 



and cany it to another place where the 

 mining was going on, as if more force was 

 needed at that point, and the slave would 

 continue to labor where she was put. 



The slaves act very differently from a 

 colony of free ants of the same species. "A 

 little more than fifty feet distant from the 

 slave-makers is a large colony of blacks that 

 were not disturbed through the summer. 

 Here all kinds of work is being carried on 

 at the same time. Some are hunting ani- 

 mal food, others are sipping the juice from 

 pears and grapes which lie near the nest, 

 while a large number are partaking of the 

 honey with which I keep them supplied, 

 and others are clearing the passages and 

 galleries of their home. The same is true 

 of the brown ant in her own dominions, but 

 as a slave she is simply a caterer and nurse. 

 Early in the season, before the sla.ve-maker 

 had so many blacks in the colony, the 

 browns and yellows both helped to clear 

 the passages and open and close the en- 

 trances, and the masters would occasionally 

 take hold and help close an entrance. 



It is thought by some excellent observers 

 that ants do not hear ordinary sounds, but 

 any careful observer must conclude that 

 they are cognizant of sound made upon the 



