MISCELLANEOUS ANIMALS 



423 



egg? It is never a wormlike larva but always a little 

 spider. 



Nearly every small creeping thing is called a bug. 

 All bugs are insects, but not all insects are bugs. The 

 distinction is more difficult than those we have just made. 

 Are any of the class sure that they have a bug in their 

 bottles ? Good examples are the giant water bug, Belos- 

 toma americanum, water boatman, Corisa undulata, squash 



Fig. 171. 

 Uj centipede ; b, millipede ; c, sow bug. 



bugs, soldier bugs, lice, bedbugs, plant lice, leaf hoppers, 

 and scale insects. Bugs may or may not have wings, but 

 all agree in having mouth parts for piercing and sucking. 

 If some child will volunteer to bring in eggs of the squash 

 bug, we will watch them hatch and thereby gain one of 

 the distinguishing characters of the group. If a good 

 magnifying glass is at hand, the eggs of plant lice will 

 do. The eggs of bugs hatch into forms more nearly like 

 their parents than is the case with most other insects. 

 They have no wings at first, but otherwise resemble 

 their parents. We will thus understand by bugs certain 

 kinds of insects that do not undergo a complete change in 



