AGRICULTURAL EXPERIMENT STATION 



139 



The insectary has been found useful in studying the life- 

 histories of insects, and its utility is likely to increase as the 



,,-rr;?^ scope of the work 

 "'[■■/'Jji. undertaken en- 



j^ v^fe^-?; larges. 



/pi /^^^?i^y 



A?fi" ■■<~:^T^®«" I desire here to 



'5r~5;^^S^? express my thanks 



IjSy^' ^ to Dr. L. O. How- 



ard and the ento- 

 mologists a s s oci- 

 ated with him in 

 the Entomological 

 Division of the 

 United States De- 

 partment of Agri- 

 c u 1 1 u r e, for the 

 determination of 

 many insects dur- 

 ing the year. The 

 assistance thus ren- 

 dered has always 









Fig. I. Rose leaf eaten by Tent Caterpillars. (Original.') 



been prompt and 

 comteous, and has been of great value in our work. It de- 

 serves the fuller acknowledgment, because it is seldom practi- 

 cable to render adequate return for the favors so freely given. 



The Insect Record for 1897 



The ravages of the common Tent Caterpillar continued 

 during the early part of the season to very much the same 

 extent as last year. We followed the history of the insects, 

 carefully noting their range ot food-plants and times of trans- 

 formations, and began a systematic study of the natural enemies 

 of the pest. We hope to continue this investigation through 

 the coming season. Already we have bred more than twenty 

 different species of primary and secondary parisites from these 

 tent caterpillars, which fortunately are subject to such enemies 

 from the time they are in the egg until they become full grown. 

 These studies have served again to show how intricate are the 



