120 



INSECTS COLEOPTERA DIAGRAM G. 



order to escape, they sometimes pierce the sheets of lead with 

 which the timbers of roofs are covered. They cut this metal with 

 their mandibles as easily as the wood itself. 



Coccinella. We will end the list of beetles by a small insect 

 known to everybody as the lady-bird, or lady-cow. It is the 



coccinella. It is carnivorous and 

 destroys the plant lice ; and is there- 

 fore a friend of man. Unfortunately 

 its small size does not allow it to 

 give us great assistance. But it 

 seems that we do not misunderstand 

 this friend, for everyone avoids 

 Coccinella, natural size, and hurting it 

 magnified. 



ORDER LEPIDOPTBRA. 



This order includes the insects commonly called butterflies and 

 moths. They have four wings alike, covered with a dust which 



adheres to the fingers 

 when they are 

 rubbed. Instead of 

 jaws, they have a 

 rolled up proboscis. 

 Their metamorpho- 

 ses are complete. 

 Butterflies cannot do 

 much harm in the 

 perfect state with 

 Red Admiral. their proboscis, but 



their larvas, or caterpillars, have jaws like those of Coleoptera, and 

 often commit great ravages. 



Silkworms. The Sttkiwrm, one of the most useful of insects, 



