156 MAY. 



are less frequent: the Papilio 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 uncommon 

 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 destructive, as may easily be ima- 

 gined from their duration and size ; the length of 

 the full-grown larvae being four inches, and their 

 period of existence in that state three years. They 

 remain in the state of pupa or chrysalis about three 

 weeks. 



