vi PREFACE 



at present exist scattered throughout the vast mass of 

 entomological literature. The arrangement of the matter 

 was necessarily determined to a great extent by the 

 method of the original issue as a series of detached 

 articles ; had the work been written for publication 

 in the present form, the plan would have been somewhat 

 modified and made more systematic. 



The seven page-plates have been made from photo- 

 graphic enlargements prepared for the oxy-hydrogen 

 lantern by Messrs. F. Newton & Co. of No. 3 Fleet 

 Street, London, who have kindly lent the negatives for 

 the purpose. 



E. A. B. 



