31 
even if it be not educational to students or visitors, it is certainly edu- 
cational to the workers at the station themselves, and by continually 
adding to such a collection they are adding to their education as well 
as to the education of the residents of the region. He had thus far 
found a great demand for collections rather different from those ordi- 
narily met with. The ordinary collection contains the rare insects as 
frequently as it does the destructive ones, and by that he meant to 
uphold the question that was raised in the address with reference to 
how many of the common insects could be found in different collec- 
tions. He suggested, that so far as his own experience goes, there 
are too few collections in which all stages are preserved in connection 
with the work that insects do. A large part of the material that he 
receives in Massachusetts does not contain any insect whatever, but. 
simply a sample of the work of the insect which has either escaped 
from the box or was never inclosed. The problem in such cases is to 
tell what has done the damage by the damage itself. He found that 
his greatest help was to preserve specimens of the insect and of the 
work it was doing, and he used such specimens in the identification of 
material sent in perhaps fifty times as often as any other specimens. 
Our collections, in his opinion, should be amplified along the lines of 
early stages and the work done by the insects, and such collections 
will appeal strongly to the people. The whole address was interesting 
and suggestive, but it was this feature which interested him most. 
He had also had experience with the Murgantia parasite obtained from 
Louisiana by the kindness of Mr. Morgan, and while he was now for- 
tunate in not having Murgantia to deal with, it was a great relief 
while searching around to find that there was some one who could 
assist him, and he thought anything in that line should be encouraged, 
for when a man wants a thing of that sort he wants it badly. 
_ Mr. Johnson said there was another important suggestion implied 
in the address, and that was the commercial side of entomology—if the 
term might be permitted. We have enough systematic entomologists 
at the present time, and perhaps enough economic entomologists, 
but we do need another lot of men who will take up purely the 
cecological side; that is, they must study conditions in the field. The 
day iscoming, and is not far distant, when our great commercial railroads 
and some of our greatest manufacturing concerns, such as canneries, 
will employ cecological entomologists just as they employ engineers 
and other skilled labor. He felt quite certain that this would come 
about, and that a new field would open to young men especially who 
would take up this commercial side of the entomological problem. To 
give an illustration of what he meant, he said he would try to bring 
this out in a paper which he would read on the following day on the 
subject of the pea louse in Maryland, which has destroyed more than 
$4,000,000 worth of green peas along the Atlantic coast this season. 
