Report of the Entomologist. 



To the Director of the Cornell University Agricultural Exjperijnent 

 Station : 



Sir. — The work of the entomological division of the experi- 

 ment station during the past year has been carried forward on 

 the lines indicated in preceding reports. That is, although a 

 considerable number of insects have been studied, the greater 

 part of our attention has been devoted to making as exhaustive 

 an investigation as possible of the few more important ones. 

 This has been done in the belief that by making a few contribu- 

 tions to science of permanent value more good can be accom- 

 plished than by publishing a much larger number that are merely 

 of ephemeral interest. 



The most important investigation of the year is that of the 

 pear psylla, an insect which has appeared in such numbers 

 recently that it has destroyed extensive orchards. The results 

 of our investigations, as set forth in a bulletin already published, 

 show that this insect can be readily controlled. 



The life history of the apple-bud moth (Tmetocera ocellana) 

 has been completely worked out; and a bulletin on this subject 

 will soon be ready for publication. 



The insects of the genus Drasteria, which includes the most 

 common moths infesting meadows and pastures in our State, 

 have been carefully studied; and the comj)lete life-history of our 

 two most common species (D, erechtea and D. crassiuscula) have 

 been traced. These two species, which differ in their early' 

 stages and in the structure of the adults, have heretofore been 

 considered as one species. 



The species occurring at Ithaca of the genus Crambus, another 

 group of moths infesting meadows and pastures, are being thor- 

 oughly studied by Mr. E. P. Felt, Fellow in Entomology. The 



