248 AGRICULTURE 



because the insects really seem to use them in that way. 

 Insects do not have a nose or ears as we have, but some of 

 them have the sense of smell very wonderfully developed, 

 and doubtless they hear many sounds that never reach our 

 ears. There are many interesting differences in the form 

 of the antennae in different insects. 



Wings and legs. The wings serve to carry their owners 

 over long distances. They are very important aids in en- 

 abling insects to find their food. A bee could not get 

 enough to eat if it had no wings to carry it from flower to 

 flower. The legs are arranged so as to balance the body 

 in walking. Having six legs, the insect always has three 

 on the ground while it is moving the other three forward. 



EXERCISE. Catch a fly and see whether you find all of the parts of 

 the body which have been mentioned. How many pairs of wings has 

 it? If you can get a magnifying glass examine the eye, antenna:, mouth, 

 and feet. Describe what you see. 



NOTE TO THE TEACHER. The United States Department of Agri- 

 culture and most of the experiment stations have issued bulletins on 

 injurious insects. The text and illustrations in these will be useful to 

 you in teaching the sections on insects. 



