8 



older publications. Unfortunately there are marked exceptions to the 

 rule; as a few of the latest synoptic and descriptive papers by the 

 younger authors are most insufficient and unsatisfactory. We have 

 added a list of the special works on Economic Entomology, and also 

 of those published by the U. S. Entomological Commission and by the 

 Department. 



There are a good many comprehensive classiflcatory works on Euro- 

 pean insects, but the almost complete absence of such works in this 

 country is a great bar to the progress of entomology and is the inevit- 

 able outcome of the immense mass of material to be worked up and of 

 the comparatively small number of workers in monographic entomology. 

 As will be seen from the contents of this bulletin, the publications of 

 this kind even in Orders most worked up, as in Coleoptera and Lepidop- 

 tera, are greatly scattered ; while in the less popular Orders compara- 

 tively little has been done. Yet with the many earnest workers now in 

 the field we may hope to see this present want met at no very remote 

 period, and if the present bulletin should prove of temporary service it 

 will not have been prepared in vain, though intended chiefly to relieve 

 the Division of a great deal of letter- writing. 



The preparation of the titles was originally placed in charge ol Mr. 

 B. Pickman Mann, but was in such shape when he left the office as to 

 require almost entire rewriting. This has been mainly done by Mr. E. 

 A. Schwarz, though other members of the Divisional force have assisted. 



C. V. E. 



