Report of the Entomologist. 



To the Director of the Cornell University Agricultural Experi- 

 ment Station: 



Sib. — I beg leave to submit the following report of the work 

 of the entomological division of this station for the past year. 

 The general plan of conducting the' work has been the same as 

 that outlined in preceding reports ; but the work has been done 

 almost entirely by the assistant entomologist, Mr. M. V. 

 Slingerland. 



The correspondence of the division has nearly if not quite 

 doubled during the past year. This has been due in great part 

 to more attention being drawn to our work through our bulletins 

 and through the farmers' institutes. Two hundred letters of 

 inquiry regarding insects and their injuries have been answered. 

 Twenty of these answers were prepared for publication and have 

 appeared in the columns of agricultural journals. 



Three pests have been monographically treated in our bulletins 

 during the year. These are the following: 



The bud moth {Tmetocera ocellana), in Bulletin No. 50. 



The four-lined leaf-bug {Pcecildcapsus lineatus\ in Bulletin 



No. 58. 



The pear-leaf blister-mite {Phytoptus pyri), in Bulletin No. 61. 



Work is now in progress on a monographic account of the 

 apple aphis {A. mali) and the apple-leaf aphis {A. sorhi?)\ the 

 latter has heretofore been treated as a variety of A. mali in this 

 country. Both species have been carefully traced on the apple 

 tree and all the forms occurring there studied. Further, A. mali 



