136 PEELERS. 



and two in front, so that they can look nearly all 

 round them at the same moment, and are thus 

 enabled to see the fly on which they feed, on what- 

 ever side it may happen to be. 



Insects are provided with very singular organs 

 of feeling. These are called antennae, and are 

 fixed on the head, like long delicate horns. They 

 are hollow, jointed, and moveable, and in some 

 instances -of great length and beauty. They are 

 very sensible, and with them these creatures feel 

 their way, as the bodies of many of them are 

 covered with hard and insensible coats, either in 

 the shape of hairs, scales, or horny membranes. 

 In addition to the antennae, insects have other feel- 

 ers ranged round the mouth, which serve to catch 

 their prey, and also as hands to hold it, whilst they 

 are engaged in eating. 



Questions. 



What is made strikingly manifest by the insect world ? 



Of what does the fifth class in the animal kingdom consist ? 



What name has been given to insects from their jointed 

 structure 1 



In what respect do they differ from the mammalia, as to 

 their breathing "? 



How do they breathe % 



Are the eyes of insects different from those of other crea 

 tures ? 



How are they constructed ? 



What advantages do insects derive from this ? 



How many eyes has the spider 1 



What are antennae, and what are they like ? 



What is their use ? 



Have insects other feelers besides antenna ? 



