SLIME SLUGS, MYRIAPODS AND INSECTS 149 



edies for these injuries, may be very different in different 

 stages of the insect's life. 



DEVELOPMENT AND METAMORPHOSIS 



Although moths and butterflies are hatched from the egg in 

 a condition extraordinarily different in appearance from that 

 which they finally assume, not all insects undergo so great a 

 metamorphosis during their development. For example, a 

 just-hatched grasshopper is unmistakably grasshopper-like in 



FIG. 65. Metamorphosis, incomplete, of an assassin-bug (family 

 Red iivi idee, order Hcmlptcra}. A, Young just hatching from eggs; B, 

 young after first molting, showing beginning wing-pads; C, older stage 

 with larger wing-pads; D, adult with fully developed wings. (% larger 

 than natural size.) 



appearance, although it has no wings and the proportions of 

 the different parts of its body are somewhat different from those 

 of its parents. The young grasshopper has three pairs of legs, 

 has a head with antennae, compound eyes and biting mouth- 

 parts like those of its parent, walks and hops about, feeding 

 on green plants, and altogether looking and acting much as 

 fully developed grasshoppers do, except that it has no wings 

 and hence cannot fly. As it grows, however, wings begin to 

 appear as tiny bud-like expansions on the back of the two 



