444 



ZOOLOGY. 



124), the tenthredes, the sirex (Fig. 474), the ichneumon, 

 the cynips, &c. 



543. The order of lepidoptera is composed of insects 

 whose mouth (Fig. 441) is so formed as to be adapted only 



Fig. 470. Termites (White Ants). 



for the drawing up of juices deposited on the surface of 

 plants; whose wings are four in number, membranous, as in 

 the two preceding groups, opaque, and variously coloured by 



Fig. 471. Ant. 



the presence of a sort of scaly dust fixed to the surface. 

 The mouth, as we have already said, has the form of a pro- 

 boscis rolled into a spiral. Finally, these insects undergo a 



