Twelfth Report of the State Entomologist 257 



single leaf there were six. A week later the new foliage had suffered 

 severely. Four or five larvae were commonly found on a small leaf. Most 

 of them were about half-grown, and a few were full-grown. September 

 25th many larvre and a few pup?e were found on the trunks of the trees. 

 A number of half-grown larvcTe and some beetles were feeding on the 

 leaves. October ist a few larvae were feeding; full-grown ones and 

 numbers of pupa; were seen on the trunks and at the base of the 

 trees, and beetles were feeding on the leaves. On the 2 2d of 

 October several young larvae were seen on a bunch of the greenest 

 leaves, and near them a cluster of egg shells from which they had 

 probably emerged within a (ew days. October 31st several full 

 grown larvae and a pupa were found at the base of one tree, and also a 

 beetle just completing its transformations. On one tree with exception- 

 ally green leaves, a number of very small larvae were seen, and near them 

 a cluster of egg shells. At this time most of the English elms were leaf- 

 less. One week later, November 7th (the last observation for the 

 season), a kw pupae were still to be found, which transformed success- 

 fully to beetles. The above facts indicate most clearly that the beetles 

 would continue reproduction so long as there was suitable food. It 

 also seems reasonable to refer the latest larvae and pupae to a limited 

 third brood, rather than to the progeny of belated individuals of the 

 second brood. 



Notes on Oviposition and Transformations. 



In connection with observations of the beetle in nature, breeding 

 experiments were also attempted. Owing to the difiiculty of obtaining 

 new leaves for the larvae, they were not so successful as could be desired. 



On the 6lh of July a large number of recently transformed beetles were 

 confined with fresh, though old, elm leaves. They fed so voraciously that 

 a new supply was furnished them every two or three days; especial care 

 was taken to introduce no eggs with the food. Egg clusters were 

 found as follows: i on the 8th; 4 on the nth; i on the 13th; 3 on the 

 14th; 2 on the 16th; 15 on the i8th ; 9 on the 21st; 3 on the 23rd; 

 and 2 on the 25th, — the oviposition having extended over seventeen days. 

 Most of ihe eggs were deposited in normal clusters and were fertile, 

 although the conditions in the cage were not quite normal. From the 

 above data it would appear that in summer most of the eggs are laid 12 

 to 14 days after the perfect form is assumed. 



At this time tender leaves could not be obtained, and the young larvae, 

 under the ordeal of their confinement, perished a few days after emerging 

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