66 THE BEAUTIES OF NATURE CHAP. 
their friends, and some of my experiments 
indicated that they are unable to send them. 
Certain species of Ants, again, make slaves 
of others, as Huber first observed. If a col- 
ony of the slave-making Ants is changing the 
nest, a matter which is left to the discretion of 
the slaves, the latter carry their mistresses to 
their new home. Again, if I uncovered one 
of my nests of the Fuscous Ant (Formica 
fusca), they all began running about in search 
of some place of refuge. If now I covered over 
one small part of the nest, after a while some 
Ant discovered it. In sucha case, however, the. 
brave little insect never remained there, she 
came out in search of her friends, and the 
first one she met she took up in her jaws, 
threw over her shoulder (their way of carry- 
ing friends), and took into the covered part ; 
then both came out again, found two more 
friends and brought them in, the same ma- 
noeuvre being repeated until the whole commu- 
nity was in a place of safety. This I think 
says much for their public spirit, but seems to 
prove that, in F. fusca at least, the powers of 
communication are but limited. 
