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61 



PRE FAC E 



TO THE PRESENT EDITION 



A RE-ISSUE of this work being required, it has been thought 

 advisable not to alter either the names or numbers employed to 

 distinguish the various species in the former edition, to which constant 

 reference has been already made in works published since its first 

 appearance, and of which the change or transposition would lead to 

 much confusion. But inasmuch as during that period the nomen- 

 clature and classification both of the diurnal and nocturnal species 

 have undergone a very strict revision, especially by Messrs. H. 

 Doubleday and J. F. Stephens, in order to arrive at a fixed and 

 uniform system of names employed both by English and Conti- 

 nental Entomologists, and as this revision has rendered necessary an 

 alteration in the names of a great number of species, it has been 

 considered that it would be more useful to add such revised names, 

 when necessary, beneath the names employed in the former edition ; 

 such names being, in fact, those which ought to be adopted ; and being 

 in all such cases enclosed within brackets. Thus, PL I. fig. 4. instead 

 of representing the Papilio Chrysotheme, as stated in page 1, is that 

 of a variety of Papilio Edusa. Wherever it has also been necessary 

 to alter the modern generic names in the third column, the names 

 substituted in lieu thereof are also enclosed within brackets. 



It is further purposed to add a certain number of Supplemental 

 Plates, illustrating species discovered since the publication of the 

 former edition, together with a synoptic list of the whole of the 

 species, in order to show their distribution into families, and the 

 position of the supplemental species, and of those whose generic 

 classification has been modified. 



J. 0. W. 





