LOCUSTS, BUTTERFLIES, BEES, WASPS 



167 



Mouth parts of the 

 butterfly. — A but- 

 terfly has its mouth 

 parts constructed for 

 sucking. The man- 

 dibles are lacking 

 entirely and both 

 lips are small and 

 inconspicuous. The 

 maxillse, however, 

 are present, and each 

 one is greatly elon- 

 gated and grooved 

 on its inner surface. 

 Moreover, they are 

 joined together by 

 their inner surfaces in such a way that the two grooves 

 meet and form a tube (Fig. 106) through which liquid 

 food is drawn. The proboscis formed by the union of 



Fig. 104. — Piece of the wing of a butterfly en- 

 larged to show the arrangement of the scales. 

 The scales have been removed from the lower 

 half to show the places of attachment. 



Fig. 105. — Wings of a butterfly after the scales have been removed. 



