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Professor Riley. On general principles it is bad policy, but the same objection 

 would apply to a reward for the eggs. If the boys once learned that they could get 

 a certain amount of money for the eggs, they would not be so interested in extermi- 

 nating them and thus cuttiug oft' future revenue. 



Professor Shaler. I should state a definite reward and not go beyond a certain 

 time. 



Mr. Craig. We have two or three village improvement associations especially to 

 take care of the trees. We extended an invitation to the citizens to take part in the 

 work, and they were to notify certain committees wherever they found any eggs. 

 This was done to a large extent, and I think it aided the commissioners very largely 

 in finding out where the moths were. 



Professor Shaleh. You can tell us about the extent of the pest in Medford. Over 

 about how large a territory did it extend? 



Mr. Craig. More or less from the Maiden line over to Arlington, 



Professor Shaler. About a mile and a half in the worst infested district. 



Professor Eiley. What was the result of the commission's work ? Are the eggs 

 found abundantly in that neighborhood? 



Mr. Craig. I don't believe there are one-tenth the eggs there were when the com- 

 mission commenced. 



Professor Riley. What was the result of the commission's work last year? Was it 

 appreciable on the number of eggs known to have been there? 



Mr. Craig. Yes, certainly. I differ from you two gentlemen about destroying the 

 eggs. I think it was the means of destroying a great many of the pests. On many 

 trees it was controlled by gathering the eggs. 



Mr. Sessions. I have no scientific knowledge on the subject, bnt it seems to me the 

 first and most important thing we have to do is to find out the outside line, even if 

 we don't do any more than that in one season. The old commissioners claim that 

 they have found it; our first business should be to verify that. 



Professor Shaler. Did they make a map ? 



Mr. Sessions. I think not. 



Mr. ScuDDKK. Ho w do they know the moth wasn't blown 50 miles away by a storm ? 



Professor Shaler. It may have been. But it is a strong point in our favor that 

 after the creature has been 20 years on the scene it still has a tolerably distinct 

 periphery. 



Professor Riley. That is what I have based my recommendation to exterminate it 

 upon. I should not like to see the attempt abandoned, but my remarks have all been 

 made with a view of economizing means and time in one effective effort to exterminate 

 it. All these other measures will come in if we have to deal with the pest as a permanent 

 thing among us. As a mere State measure, with a view to not having the unenvia- 

 ble reputation of having given a pest to the rest of the country, or done nothing to 

 prevent its spread, Massachusetts has an excellent opportunity of showing what may 

 be done by intelligent concentrated eff'ort. All other means are puerile as compared 

 with destruction by the arsenicals. All other means are now abandoned in fighting 

 the canker worm, the codling moth, and some other insects, and intelligent spraying 

 at the proper time has come to be looked upon as the most efficient means of protec- 

 tion against these insects. My idea is that what you ought to do is to employ a suffi- 

 cient force of intelligent persons to scour that whole region in the month of June, 

 and indicate every plant that has a brood upon it. 



Professor Shaler. Suppose you had 100 persons searching at the same time. 

 What general instructions could you give them in determining what trees were in- 

 fested ? 



Professor Riley. The insect is gregarious and therefore conspicuous. There is no 

 reason why intelligent search should not detect it, even on the highest trees. 



Professor Shaler. How much time could you reckon on having foj your search 

 after the creature came out ? 



