262 



FUNDAMENTALS OF AGRICULTURE. 



squash-bugs and harlequin cabbage-bugs are good ex- 

 amples. 



How Insects Move. The grasshopper has three 

 ways of moving. It has four strong wings attached 

 to the thorax with which it can fly. On the other hand 

 a house-fly has only two wings. But whether an insect 

 has two or four wings they are always attached to the 

 thorax. The grasshopper also has six long legs with 

 which it can walk, only slowly, however. House-flies 

 can walk quite fast. Many beetles, cockroaches, and 

 some other insects can run very fast with their six legs. 

 Finally the grasshopper, with its very large, long and 

 strong hind legs can leap, or hop considerable dis- 

 tances. Fleas, some beetles, and certain other insects, 

 can also hop. The majority of insects, however, have 

 only two methods of movement, flying and walking. 



It must be noted that not all insects have wings. 

 Many ants, a few moths, bedbugs, fleas, some beetles, 

 and certain other insects have no wings and can only 

 move by means of their legs. 



How Insects See. Insects have two, large, com- 

 pound eyes, one on each side of the head, like the grass- 



a, a. feelers, or 

 antennae ; c, c, 

 compound eyes; 

 s, single eyes 

 (Herrick's Zo51- 

 ogy). 



PART OF GRASSHOPPER'S COM- 

 POUND EYE (HERRICK'S ZO- 

 OLOGY). 



