MAY. 131 



pilio Machaon has been taken once at Newark 

 on Trent, and at Welbeck. 



Cossus ligniperda, or Goat-moth. A moth of 

 large size and considerable beauty, not uncom- 

 mon towards the end of this and the beginning 

 of the next month ; the larvae live in the solid 

 wood of the oak, the ash, and the willow, but 

 more particularly the last; which they perforate 

 in various directions. They are very destruc- 

 tive, as may easily be imagined from their du- 

 ration and size, the length of the full-grown 

 larvae being four inches, and their period of ex- 

 istence in that state three years. They remain 

 in the state of pupa or chrysalis about three 

 weeks. 



