2 Bulletin of the Brooklyn Entomological Society. Vol. XIV 
furtherance of the subject of entomology. It is therefore essen- 
tial that the systematist lend all the assistance he possibly can 
to those in the field who are carrying on control measures. And 
indeed this assistance can count for much. 
Allow me to point out a few ways in which this can be done. 
First, by the prompt determination of specimens sent in by the 
field men, and a return of the specimens whenever possible. 
Second, by supplying needed references and complete bibliog- 
raphies of insects that are being studied. There is much in the 
library of nearly all systematists that would be of great value to 
economic workers and could easily be made available by a little 
more willingness on the part of both to co-operate. Third, by 
limiting for the time being his monographic work to groups that 
are of economic importance. 
In return for these helps the economic worker should be willing 
to supply full data and as much as he can when submitting speci- 
mens for identification and then have a reasonable amount of 
patience in waiting for the determinations. 
In the way of constructive criticism I venture to say that the 
foundation of any misunderstandings between these two groups 
of entomologists lies in the ignorance that one may have of the 
other’s work. There are many, especially young entomologists, 
who have absolutely no taxonomic knowledge of a single group 
of insects,—even some who have been in entomology for years 
who would come in this class. Then too there are men who from 
time to time attempt a piece of systematic work and who go to 
the field only to collect and never even inquire into the activities 
of the biological or economic worker. 
This condition however prevalent it may seem to be should 
and could be eliminated by requiring young men, starting in the 
profession of entomology, to choose some small and well defined 
group of insects for taxonomic study and also by requiring the 
young men contemplating systematic work to spend the greater 
part of at least two years doing biological and economic field 
work. 
For the future advancement of entomology, workers in a par- 
ticular branch of the subject must have a better appreciation of 
the problems of the other branches. 
