392 



THE INSECT WOELD. 



when peace reigns supreme ; but they are not more exempt than 

 other animals from the necessities and dangers of war. They have 

 a great many enemies among the population of the woods ; they 



Fig. 367. Ant milking Aphides, or Plant-lice (magnified). 



must, then, be prepared to repel their attacks. They display in that 



the most scientific resources of the military art applied to defence. 



It is almost needless to say that sentinels are, at all times, posted 



