180 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



elms that died, and, to the best of my knowledge, in the last three 

 years there has never been an elm leaf beetle on those trees. 



President F. L. Washburn: This reminds me of a condition in 

 Minnesota. We are losing many of our fine oak trees, which have 

 died this last summer in enormous numbers. This death seemed 

 to be due to a borer or borers and also to a fungus attack on the root. 

 Normally, I think these trees would withstand these attacks, but a 

 year ago we had a drought, and up to this last fall the ground from a 

 foot below the surface downward was as dry as tinder, and I believe 

 that while the trees would normally resist the attack of these beetles, 

 which probably occur every year, this last year they were so weakened 

 by unfavorable conditions that they succumbed in large numbers. 

 We have reared the borers, I believe. Mr. Spooner, what did those 

 Buprestids prove to be? 



C. S. Spooner: There were two species, the flat headed apple 

 tree-borer and the destructive borer, Agrilus bilineatus. 



President F. L. Washburn: Any further discussion on these 

 two papers? If not we will go to the next paper, "The Gooseberry 

 Gall Midge or Bud Deformer {Rhopalomyia grossularicB Felt)" by 

 Mr. Houser, of Wooster, Ohio. 



THE GOOSEBERRY GALL MIDGE OR BUD DEFORMER^ 



(Rhopalomyia grossularice Felt) 

 By J. S. Houser, Ohio Agricultural Experiment Stition, Wooster, Ohio 



The gooseberry gall maker is a new pest of gooseberries, having 

 been described by Dr. E. P. Felt- from material sent him by the author. 

 It is not known to occur anywhere except on one farm in the vicinity 

 of Camp Chase, Ohio, and there its work is of a serious nature. 



The plant is injured by the insect working during the larval stage 

 in the terminal buds of spurs and branches, causing the bud to become 

 abnormal both in size and structure. The bud scales increase greatly 

 in numbers and size and, lying closely one upon another form a gall 

 somewhat resembling in miniature the pine-cone willow galls so com- 

 monly encountered upon the tips of willow twigs. 



The injured bud is incapable of producing normal leaves and the 

 plant, striving to maintain itself, develops secondary buds w^ithin or 



1 Contribution from the Ohio Agric. Exp. Station, and the Department of Economic 

 Entomology, Cornell University. 



2 Journal of Economic Entomology. Description, Vol. 4, No. 3, p. 347. Journal 

 of Economic Entomology. Hosts and Galls of Amer. Gall Midges Vol. 4, No. 5, p. 

 468. 



