which I ihoIkiMv ni'\ it >.hall I'murc : \\\r species which I liaxc (h'--crihcil ii]i Id 

 tlie |>reseiit tiiu(> aiuoiiut to S27, ol' tliesc <)() have apijcai-ed fur the lirst lime in 

 •' l/'pi(h>ptera Exotica;" 711 haviiiii" l)e.'ii lii^ured by myself, 31:5 of them, 

 ilhistrate.l h\ I f.) liniires, in tiiis \\(Mk. 



It can. I tiiink, scarcely l)c denied that, as a book of rcfei-ence. this \\"i)rk 

 is not entirely valueless, when it is considered that, in addition to a complete 

 illustrated Monoi;rai)li of the ucniis C"/fl(fi\>/ns; it contains representations of 

 no less than 117 u'cnera. se\cral '>[ them |ii'e\ imisly iiiiknoun to Science: 1 feel 

 therefore, notwitlistandinu' the cnhl water which lias ln-en lavislily cast ni)on 

 my nndertakinii'. that 1 have, in a measiirc, advanced the stud_\ dl' this most 

 attractive branch nf l:nt(imoliii;-y. 



[ now turn to the pleasant task of expressing' my uratitude to those -who 

 have kindly assisted nie with su])|eets tor my illustrations, foremost amongst 

 whom I am indebted to ll(n-bert Drnee, I'.sc^., W. A\'ilson Saunders, Esq., and 

 Andrew Swanzy, Esq., Avho have at all timi's allowed me to select what 1 chose 

 fi-dm their extensive Collections, and who have ever shown a warm interest in 

 my AVork : my thanks are also due to 11. Ansell, Esq., E. Brow u. 1>([., 'I'. 

 Chapman, Esq., !*]. Charleswcn-th, Escj., the Rev. T. Cornthwaite, W. L. M, 

 D' Urban, Esq., E. C. Heed, Esq., W. C. lEewitson, Esq., E. W. -lauson, Esq., 

 I'aphael Meldola, Esq., F.Moore, Esq., Lieut. How land Roberts, Osbert Salvin. 

 Esq., the Rev. F. A. Walk(>r, .Mfred Wallace, Esq., Lord AValsingham, C. 

 AVard, Esq., aud II. AVhitely, liS([., all of whom have lent or given me 

 specimens. 



I have iiol followed the plan adopted by Alessrs. Edwards, llewitson, and 

 Ward, of leavinn- the pages and plates unmimlxn'ed, as 1 have myself experi- 

 enced nuich dillicully iu referring to their descriptions and ii^ures until the 

 completion of a volume; I have also l)ei'u nnwillinn' to put myself under the 

 necessity of iinuriiiL'' s])ecies of the same u'citus on one plale. 



A. G. BUTLER. 



17, OXFOltl) RuAlJ, llvi.lNG, ^IjJi-l/. 1^7 f. 



