ADVERTISEMENT. 



The great necessity for rocotjni/able lii^iires of Lepidoptera is a tliiiiiif whicli, 

 in coiniuon with otluM- working Entomologists, I liave long and diM>2)ly felt. 

 Complex descriptions without illustrations of any kind to assist in their deter- 

 mination, arc, to say the least, a severe tax upon the patience and ingenuity of 

 all who wish satisfactorily to interpret them. 



That magnificetit Woik wliicli the Fki.dkrs have so recently jjroduced, from 

 the number of its minutt-ly exhaustive descriptions of unfigui-ed species, 

 destroys the pleasure which one would otherwise derive from a contemplation 

 of its very beautiful plates. The temptation to describe new and striking 

 sjiecies, with or without figures, is doubtless strongly felt by all who love to 

 call the beautiful their own ; and in conunou with others, I must plead 

 guilty to having been betrayed into it : this is however an error of which 

 I have long repented, and long desinnl to atone for ; but up to the present 

 time no opportunity has offered of wliicli 1 could avail myself. 



Through the kindness of yiv. .Ianson I am at length enal)I('d to commence 

 a "Work which will, I trust, entitle me to those blessings which my esteemed 

 friend Mr. IIewitson has so often assured me are the reward of a recognizable 

 figure. I can only add that it will be my endeavour throughout the i^'escnt 

 undertaking to ])roduee characteristic' copies of the originals, and render the 

 accompanying descriptions as definite as possible. 



The object of this Work, which will be issued in Qiiarlerli/ Parts, is 

 to give representations of all such new or little known species as may be con- 

 sidered of sufficient interest to merit attention. 



A. G. BUTLKR. 



