230 MINUTE MARVELS OF NATURE 



magnified view of the tips of a pair of the wings of 

 one of the more delicate forms, which, although the 



Fig. ii:;3. Head of the larva of a dragon-fly. 

 Magnified to show the niasl-; and true jaws below 



nervures are frail, are strengthened one with 

 another until they can be used with considerable 

 muscular force, and so attain the speed necessary 



