HVMENOl'TKRA ; ICHNEUMONS. 



149 



plant lice, — little insects which live upon the juices 

 of plants, and yield a honey-like fluid. Some kinds 

 of Ants collect large numbers of aphides and keep 

 them on plants, that they may eat the sweets which 

 they produce. There is generally but one species 

 of Ant in each nest, but in some cases the workers, 

 or, rather, warriors, make slaves by visiting the hills 

 of other species, forcibly taking the larvae and pupae, 

 and bringing them back, where they are tended and 

 reared by workers of the same kind which have be- 

 fore been stolen in the same way. Ants are very 

 warlike, and engage in deadly pitched battles. 



Ichneumons. 



These Insects have a long, hard, slender body, long 

 antennae, and the ovipositor is usually long ; the latter 



Fig. 260. — Ich- 

 neumon. 



Fiy. 259. — Ichncuniuii la) i ng licr eggs in holes 

 bored by the Boring Sawfly, Figure 262. 



is sometimes two or three times the length of the body. 

 They lay their eggs in the eggs, larvae, and pupae of 



