PREFACE. VU 



Lastly the Hon. Walter Rothschild has lent all the types described 

 by Feldcr in the ' lleise Novara' which are in his immense collec- 

 tion, and has placed all the rest of his material at our disposal for 

 examination. 



Prof. Harrison G. Dyar, of the United States National Museum. 

 Washington, and Dr. T. A. C. Chapman, liave very kindly looked ovei 

 the parts of the Introduction relating to the early stages of the 

 Lepidoptera, of which they have made a special study, and have 

 made many suggestions and corrections which have been of the 

 greatest possible value. 



Dr. A. G. Butler has given the author the advantage of his 

 assistance in revising the proof-sheets. 



As the coloured illustrations of new or hitherto inadequately 

 figured species, though of the greatest value to the progress 

 of zoology, are not essential to the plan of the work, and if in- 

 corporated would have added greatly to its cost, it has been 

 thought best to issue them separately, and to produce the text 

 alone at a price which may make it readily accessible to all 

 working entomologists. 



W. H. FLOWER, 



Director, 



British Museum (Natural History), 

 30th September, 1898. 



