10G INSECTS DIAGRAM 6. 



in a point, but these are the only movements which it can make. 

 It has no visible limbs, and does not eat. All the pupse of insects, 

 however, are not thus immovable, and there are some which much 

 resemble either the larvae or the perfect insect. 



Imago state. After the chrysalis has remained motionless for 

 some time, the skin which envelopes it tears or splits, and the 

 perfect insect emerges in the form which it will henceforth retain. 

 It is the structure of the perfect insect which we are now about to 

 try to describe. 



The body of an insect (we may take a cockchafer as an example) 

 seems to be entirely composed of a definite number of solid rings 

 regularly arranged, and forming three very distinct regions, the 



Antenna of Antenna of Antenna of 



Motb. Cockchafer. Weevil. 



head, thorax, and abdomen. These rings, as also those which 

 form the limbs, are called segments. 



The head is provided with a mouth, antenna3, and eyes. The 

 antennae are a kind of small horns which are found in many ar- 

 ticulated animals. They have very different shapes, as may be 

 seen by comparing those of a moth, a cockchafer, and a weevil. 

 In the moth or butterfly, they are formed of a great number of 

 very small joints placed end to end. In the cockchafer they are 

 formed of plates which seem to form a fan. In the weevil, the 

 antennae are elbowed at a right angle. Insects use their antennas 

 to feel the objects or the ground round them. 



The mouth differs much in different insects; but it never 



