2 



Index Testaceologicus, or Catalogue of Shells ; to which, indeed, the 

 present Work is intended to form a Companion. 



No pains will be spared to make the Figures as accurate as possible ; 

 and to accomplish this most essential purpose, recourse will always be 

 had to the Insect, so that the Figures will be entirely original. And 

 here the Author has great pleasure in acknowledging his obligations to 

 J. G. Children, Esq., of the British Museum, who, with that liberality 

 which is ever ready to promote the benefit of others, has done all in his 

 power to forward the undertaking. 



To J. F. Stephens, Esq., and to Mr. Bentley also, the thanks of the 

 Author are especially due, for the use of their invaluable collections, 

 which include, with very few exceptions, the whole of the British Lepi- 

 doptera. 



The Systematic Catalogue of British Insects by Mr. Stephens will 

 be the guide throughout, and the Work will be printed in columns, 

 containing the Latin and English Names of the Insects, References to 

 Authors, Times of Appearance, and Places where found, &c. 



The expense of an undertaking like the present, which will require 

 more than eighteen hundred Figures, must necessarily be great, and the 

 time and trouble it will take to complete it considerable. It is there- 

 fore intended to produce the Work in Numbers ; — each Number to 

 contain two or three Plates, and each Plate 36 Figures. 



It is particularly requested that those who intend to favour the Work 

 with their support, will have the goodness to be early in their applica- 

 tion; as the Subscribers will receive their copies strictly in the order of 

 priority. 



It being the object of the Author to combine accuracy with economy, 

 he engages to produce the Figures, to Subscribers, drawn and coloured 

 with the greatest possible care, at one penny each. Or on royal paper, — 

 of which a limited number of copies will be printed, to correspond in 

 size with the elegant works of Curtis, &c, — at three half pence each 

 Figure. Plain copies will be less than half the price. 



The Numbers to be paid for on delivery. 



39 Tavistock Street, Covent Garden. 

 April 21st, 183% 



