HEXAPOD A. 
51 
It is of course much smaller than the adult, and is not fur¬ 
nished with wings. Still the form of the body is essentially 
the same as that of the adult (Fig. 57). (The hair-line 
above the figure indicates the natural size of the insect.) 
After a time rudimentary wings appear; and these increase 
Fig. 57.—Nymph of Melanoplus , Fig. 58.—Nymph of Melanoplus , 
first stage. (After Emerton.) second stage. (After Emerton.) 
Fig. 59.—Nymph of Melanoplus , third stage. Fig. 60.—Nymph of Melanoplus , fourth 
(After Emerton.) stage. (After Emerton.) 
1-1 
Fig. 61 —Nymph of Melanoplus , fifth Fig. 62.— Melanoplus, adult, 
stage. (After Emerton.) 
in size from time to time till the adult state is reached (Figs. 
57 to 62). During this development there is no point at 
which the insect passes into a quiescent state corresponding 
to the chrysalis state of a butterfly. Those insects which, 
like the locust, when they emerge from the egg resemble in 
form the adult, but still undergo some change, arc said to un¬ 
dergo an incomplete metamorphosis. In other words, after 
leaving the egg they do not undergo a complete change of 
form. 
Complete Metamorphosis .—Still other insects, like the but- 
