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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 frequentl}^ the case that one is working out with considerable 

 care the life habits of an insect, and a little information from exact 

 observations upon some particular point in other localities would be 

 of great servdce 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 1.5, 

 and removing the larva? 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 countr3^ 

 The value of such a collection I do not need to urge upon you, as it 

 will be admitted b_v all. I wish it might be determined by secret bal- 

 lot in this meeting just how manj^ 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^ Carjpocapm pomoneUa^ Mela- 

 noplus spretus^ Cecidomyia destructor^ Coccotorus prunicida^ Typhlo- 

 cyha conies. Tinea p>eUionella^ Cicada septendecim^ Scolytns rugulosus, 

 Psylla pyricola, or QVQ,n Aspidiotus perniciosus and Aspidiottis ancylus. 

 If you are fortunate enough to have the two last named, can you tell 



