136 



ZOOLOGY. 



are not able to do any damage, can therefore be 

 brought into the fields. Strewing with soot has a 

 good efiect. It pays to pick off the larvje from young 

 plants. 



Order 5 : Lepidoptera (Butterflies and Moths). 



Sucking mouth-parts, forming a " proboscis " made 

 up of the two very long maxillse, spirally rolled up 

 under the head when not in use (Fig. 92), and adapted 

 for sucking honey. There are some forms which take 

 no food in the adult condition, and in which the 

 proboscis is short ; in a few species of hawk-moths, 

 this organ is even longer than the body. The larvae 

 (" caterpillars ") have biting mouth-parts. The body 



^ 



^"S" 92^Hcad of a. f,6. 93._Scales from a Butterfly's Wing 



Butterfly. A, eye ; (Btrongly magnified). 



Pli, anteonse ; Z, 

 proboscis. 



of a butterfly, or moth is covered with hair-like 

 structures developed by the skin ; in the wings these 

 are broader, have a characteristic appearance (Fig. 93), 

 and partially overlap one another. These scales cause 

 the colours of the wing. They can easily be wiped 

 off, leaving the corresponding part of the wing 



