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 classificatory 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- writiug. 
The preparation of the titles was originally placed in charge ot 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. Y. R. 
