STRUCTUKE A^D DEVELOPMENT OF INSECTS. 7 



bears no appendages save the ovipositor of the females of 

 certain orders. 



Harvest-mites, or ^^ daddy-long-legs/^ sow-bugs, thou- 

 sand-legged worms, and similar vermin are often popularly 

 called insects, but all of them can readily be distinguished 

 from true insects by their possessing more than six legs. 



Fig. 1. — Honey-bee, showing three principal regions of the body 

 of an insect : — Ji, head; tJi., thorax; aJ/d., abdomen. (Original.) 



the harvest-mites and spiders having eight and the others 

 many 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 transformations. Grasshoppers 

 and some other insects, however, upon hatching from the 

 egg bear a marked resemblance to the adult form, except 

 that they lack wings. 



