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the more we can have of it the better. It is only the ‘‘unnecessary 
duplication of work” that our constitution deprecates. 
It is frequently the case that one is working out with considerable 
eare the life habits of an insect, and a little information from exact 
observations upon some particular point in other localities would be 
of great service to him. The person giving the information would 
have full credit for what he did, and the world would have the benefit 
of the combined results. When time can not be taken by the head of 
a department for this aid, it may often be the case that a special 
student in entomology would be glad to get his name into a bulletin 
for doing a little good work. I have a case in mind to illustrate. 
The speaker is working on the life history of the codling moth. His 
observations make him wonder how it can be possible that there can 
be so few as one brood or so many as three or four anywhere. He 
would be greatly aided if a few entomologists in different parts of the 
country would make the following observations and report results this 
year. First, obtain date of blooming of the earliest apple trees. 
Second, determine the time of appearance of the first moths of the 
second brood by collecting a few of the earliest wormy apples and 
rearing the moths from them. Third, determine when the brood of 
worms that go over winter without pupation begin to leave the fruit. 
This can be done by placing cloth bands on the trees about July 15, 
and removing the larve that appear under them once a week until 
those have been taken that do not change to a chrysalis within a short 
time. Then, with the other facts that have been well worked out, it 
will be possible to state with considerable definiteness the number of 
broods in different portions of the country. 
There is one other of the many opportunities for cooperation to 
which I wish briefly to call attention. So far as possible every station 
entomologist should build a collection representing the insect fauna of 
his State. In addition he should get together as complete a collection 
as possible of the injurious and beneficial insects of the whole country. 
The value of such a collection I do not need to urge upon you, as it 
will be admitted by all. I wish it might be determined by secret bal- 
lot in this meeting just how many out of a dozen of our worst pests 
that I might name are represented in the collections belonging to the 
different stations. I would not dare to ask you to reply verbally for 
fear it might be embarrassing. And then you might turn about and 
ask me to answer my own question. Don’t any of you blush while 
you try to recall how many of the following species you can show to 
an inquiring friend: Blissus leucopterus, Carpocapsa pomonella, Mela- 
noplus spretus, Cecidomyia destructor, Coccotorus prunicida, Typhlo- 
cyba comes, Tinea pellionella, Cicada septendecim, Scolytus rugulosus, 
Psylla pyricola, or even Aspidiotus perniciosus and Aspidiotus ancylus. 
If you are fortunate enough to have the two last named, can you tell 
