PKEFACE. 



The present volume, which is supplementary to Vol. III. of 

 Lepidoptera Phalsense, was in manuscript at the beginning 

 of 1915, and the text-figures and most of the Plates had 

 been prepared; but, owing to the European War, it was 

 decided to postpone its publication. 



It has now been completed and brought up to date as far 

 a3 possible. For the reason just mentioned, however, no 

 references will be found in it to German publications which 

 have appeared since August 1914. 



The Arctiidre in Vol. III. included 147 genera and 845 

 species, and to these are added in the present volume 25 

 genera and 1215 species. 



The Agaristidse, for which the name Phalsenoididse is 

 substituted, included 53 genera and 225 species, and these 

 numbers are now increased by 7 genera and 80 species. 



The term " subspecies " is occasionally made use of in 

 this volume simply to denote that our present knowledge of 

 the form referred to is insufficient to determine whether it 

 is a species or an aberrational variety. 



Sir George Hampson has to acknowledge the great assis- 

 tance he has received from The Rt. Hon. Lord Rothschild, 

 F.R.S., Mr. J. J. Joicey, into whose hands the collection 



