tJNDER THE MAPLES. 133 



down the milk. I noticed that the soldiers often 

 changed places, those at the front going to the rear. 

 The cause was soon apparent. All along the rear the 

 milkers were feeding the troops. Other milkers were 

 constantly going to and from the subterranean city, 

 which was situated not far from the pasture -lands. 

 They were, no doubt, supplying the queens and other 

 members of the colony who were unable to be in the 

 ranks. 



After witnessing this skirmishing for several days, 

 I established a drove of Aphides near the city of the 

 hostile colony. Some of the invaders were always on 

 the road between the two colonies, slowly walking back 

 and forth, like sentinels, to watch over their city, that 

 it might not be taken by surprise while the protectors 

 were absent. And now one of the sentinels came upon 

 the cows, and ran around among them in an evident 

 state of excitement, but did not stop to obtain any 

 milk. Apparently satisfied with the fine condition of 

 the herd, she ran with all haste to impart the good 

 news to the army stationed around the neighboring col- 

 ony. I followed her closely, never losing sight of her 

 amid the throng. On her way she frequently met a 

 returning comrade, whom she stopped for a moment 

 and touched with her antennae. The speed of the com- 

 rade after obtaining the news was greatly accelerated in 

 the direction of home. The sentinel reached the outer 

 ranks of the army, and communicated with every one 

 with whom she came in contact, and somehow imparted 



