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insects to provide for the perpetuity of their kind, although the quality 

 of the eggs had not deteriorated. 



During the whole period the beetles were under observation they 

 consumed large quantities of foliage, comparatively speaking. Many 

 of the trees outside were also badly riddled by the feeding. If we 

 consider for a moment the relatively large bulk of eggs produced by the 

 beetles it is not surprising that they require a large amount of food. 

 Without attempting to make precise measurements it would seem that 

 a cluster of 30 eggs would present, after deposition, a bulk about equal 

 to that of the parent insect. If this be a fair estimate, they produced on 

 the average trom nearly one-half to nearly two-thirds of their bulk in 

 eggs daily during the first eleven days in June, and from the 12th to the 

 23d the daily average was from over two-thirds to an equal bulk. This 

 rapid elaboration of eggs must make a large demand upon the system 

 and require an abundant food supply. 



Lest it be thought that the period of oviposition was abnormally 

 prolonged, I would state that recently deposited eggs were to be f >und 

 on the trees up to July 9. This record indicates most emphatically the 

 value of spraying to kill the beetles, especially before they have 

 reached the more prolific period mentioned above. 



A few notes confirmatory of previous records concerning the life his- 

 tory of this insect in Albany and Troy will undoubtedly be of interest. 

 The last of the over- wintered beetles were seen early in July. On the 

 16th recently transformed adults were easily found, and fresh eggs a 

 few days later, either singly or in small clusters, indicated the begin- 

 ning of oviposition by the second brood. On the 12th of August Mr. 

 P. 0. Lewis, who has charge of the spraying in Albany, informed me 

 that the second brood of larva? had been quite injurious in certain parts 

 of the city, and that the beetles, ever on the watch for tender foliage, 

 riddled the leaves very quickly. A visit to Troy on the 13th showed 

 that practically the same conditions prevailed there. Soon after the 

 foliage appeared it was attacked by the beetles, and by the time the 

 leaves were about half grown many larva? were to be found upon them. 

 The injury to the elms in Troy by the first brood of larva? exceeded 

 that of the preceding two years, because it was not only much more 

 extended but the skeletonizing of the leaves was more thorough. As 

 a rule all the European elms were practically defoliated. The same 

 would have been true of Albany were it not for the spraying done by 

 the city. An interesting feature in the latter city was the more extended 

 injury sustained by the American elms. In Troy comparatively few of 

 this species appear to have suffered much. The same was true of 

 Albany two years ago. Last year considerable injury was inflicted, 

 aud the present season much more, in spite of the spraying. It should 

 be stated that rainy weather, just after the larva? hatched, marred the 

 efficiency of the work seriously. A few of the American elms in Albany 

 have lost nearly every leaf, and hundreds have been so affected that 



