IGG 



LOCUSTS, BUTTERFLIES, BEES, WASBS 



the structure of the hind pair of legs, at least ; in its Hfe 

 history; m the form of its antenna;; and in the absence of 

 simple eyes. 



Wings of the butterfly. — If a butterfly is caught in the 

 hand, a fine, dustlike substance is always rubbed from the 



wmgs by contact with 

 the fingers. If this sub- 

 stance be examined imder 

 a microscope, it ■\\'ill be 

 found to consist of tiny, 

 flat, somewhat fan-shaped 

 bodies called scales. The 

 wings of butterflies are 

 alwaj's clothed with scales 

 that overlap like shingles 

 on a roof (Fig. 104). 

 They undoubtedly aid in 

 strengthening the fling. 

 When the scales are all 

 removed from the fling, it 

 appears as a thin trans- 

 ])arent memljrane flith 

 vems running lengthflise 

 and flith fefl^ cross veins (Fig. 105). The fl'uigs of the 

 butterfly are never folded like those of the locust, but are 

 held vertically fliien the insect is at rest. 



The legs of the butterfly. — Although this insect has six 

 legs they are fl'eak and are little used for locomotion but 

 rather for the pm-pose of clinging to objects upon which the 

 insect may alight. Again, although the hind legs are larger 

 than those of the other pairs they are not large and muscular 

 like the hind legs of a locust and are not used for jumping. 



Fig. 103.— fl'liite cabbage butterfly, 

 lar^•a, and pupa. 



