STRUCTURE AND DEVELOPMENT OF INSECTS 



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insects, but all of them can readily be distinguished from true 

 insects by their possessing more than six legs, the harvest-mites 

 and spiders having eight and the others ten or more. 



How Insects Grow 



With rare exceptions insects hatch from eggs laid by the 

 adult females. Upon hatching they are but little larger than 

 the eggs, and often bear but little resemblance to their parents. 

 Thus the young caterpillar would never be recognized as the 

 immature stage of the butterfly by one unfamiliar with its trans- 



FIG. 15. Complete metamorphosis. The different stages of the corn ear- 

 worm (Chloridea obsolete, Fab.): a, eggs on corn-silk; 6, the first three 

 larval stages; c, pupa from below; d, same from above; e, adult moth 

 all enlarged; 6, about twice natural size. 



formations. Grasshoppers and some other insects, however, upon 

 hatching from the egg bear a marked resemblance to the adult 

 form, except that they lack wings. 



