are ascertained to be inhabitants of Great Britain ; the unique 

 specimen figured, which is a female, was taken in the month of 

 July at "Windsor several years since by Mr. Griesbach, and 

 presented to the British Museum by Dr. Leach. 



The larvae of this Genus greatly resemble those of the Lepi- 

 doptera, except that they have twenty-two feet ; they have also 

 two lateral apertures from which they are able to spirt a fluid, 

 for what purpose we can only conjecture, probably it may be 

 sufficiently fetid or noxious to protect them against the attacks 

 of the destructive Ickneumotiidce. When the larvae are full 

 grown, they form for themselves an oblong hard case, which is 

 generally attached to a twig or small branch of the tree they 

 fed upon, vsdthin which they change to an incomplete pupa. 



The plant figured is Holcns jnollis (Creeping Soft Grass). 



