120 



INSECTS COLEOPTERA DIAGRAM 6 



in wood. In 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 hurting 

 Coccinella. it. 



OfiDEK LEPIDOPTEBA 



This 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 

 metamorphoses are 

 complete. Butterflies 

 cannot do much 

 harm in the perfect 

 state with their 

 Red Admiral. proboscis, but their 



larvae or caterpillars have jaws like those of Coleoptera, and 



often commit great ravages. 



Silkworms, The silkworm, one of the most useful insects 



