172 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



time, at least before the mine had been perceptibly enlarged. The 

 contrast, later in the season, between the topmost branches, which 

 we could not reach and the lower branches was very marked. The 

 leaves not sprayed were almost completely mined and became withered 

 and most unsightly. 



Apparently the elm leaf-miner can be controlled by spraying with the 

 tobacco extract and soap. We shall have an opportunity to make a 

 much more extended trial of this method of control during the coming 

 season. 



The Larch Case-Bearer (Coleophora laricella) 



I have been giving considerable attention to the life history of this 

 pest on larches during the past two years together with an attempt 

 to find a practicable and efficient method of control. 



This insect passes the winter in its fall case attached to the branches 

 of the tree. On April 7th, before the buds had begun to swell and 

 before the larvae had left their winter positions, we sprayed a badly 

 infested tree with lime-sulphur at scale strengths. The lime-sulphur 

 was the home-made concentrated and tested 29° Baume. It was 

 diluted 1 to 7 and the tree thoroughly coated from top to bottom. 

 The next day there was a heavy fall of snow. The subsequent three 

 or four days were clear and sunny. 



By April 27th an examination of the trees showed that the buds had 

 started and that on the unsprayed trees the larvse had moved to the 

 leaves. On the sprayed tree, however, not a larva had left its winter 

 position. On May 5th I examined many larvae and found only two 

 alive. The others were dried up and dead. In subsequent examina- 

 tions I was unable to find that a single larva had moved from its 

 hibernating position to the leaves. It would seem that the lime- 

 sulphur at scale strengths is highly efficient for this particular pest, 

 at least. 



President F. L. Washburn: Discussion of this paper will come 

 after Mr. Burgess' paper, "Some Shade Tree Pests in Eastern Massa- 

 chusetts." 



SOME SHADE TREE PESTS IN EASTERN MASSACHUSETTS 



By A. F. Burgess, Melrose Highlands, Mass. 



In ,few sections of the country have shade trees suffered more from 

 the attacks of injurious insects than in Eastern Massachusetts. This 

 region has not only had the usual number of native pests but from 

 time to time several introduced, and very destructive foreign species 



