ON THE SERRICORNES. 383 



contrive to render a tree carious, to such an extent, that it 

 will perish after having been in a decaying state for a con- 

 siderable time. It is on the trunk of those same trees that 

 the perfect insect is to be found, either at the time when it 

 has just arrived at that state on issuing from the nymph, or 

 when the female returns thither for the purpose of depositing 

 her eggs. 



