ENTOMOLOGICAL SOCIETY OF ONTARIO. 87 



chosen secretary pro tern. The address of the retiring president, Prof. F. M. Webster, 

 treated of " The Present and Future of Applied Economic Entomology in the Unitsd 

 States," and contained, among other very interesting features, an admirable tribute to 

 the value of the system atist and a somewhat caustic criticism of the "species maker," 

 helpful suggestions for the Experiment Station worker, and a very frank discussion of 

 the unfortunate results which attend the attempts sometimes made to combine politics 

 and science. 



The following were elected to active membership : 



A. T. Britton, New Haven, Con. 



G. B. King, Lawrence, Mass. 



Gerald McCarthy, Raleigh, N.O, 



E. P. Felt, Albany, N.Y. 



A. F. Burgess, Maiden, Mass. 



W. B. Barrows, Agricultural College, Mich. 



R H. Pettit, 



W. S. Blatchley, Indianapolis, Ind. 



The following were elected foreign members : 



Claude Fuller, Richard Helm, both of Perth, West Australia, and W. W. Froggatt, 

 Sydney, New South Wales. These additions increase the numbers of this Association 

 to 93 active and 31 foreign members. 



Prefacing his remarks with a brief review of the damage by the larva? of Orgyia 

 leucostigma in Washington during the summer of 1895, and the important influence 

 of parasites in controlling this outbreak, Mr. Howard presented the following papers : 



ADDITIONAL OBSERVATIONS ON THE PARASITES OF ORGYIA 



LEUCOSTIGMA. 



In Bulletin No. 5, Technical Series, Division of Entomology, United States Depart- 

 ment of Agriculture, entitled " A study in Insect Parasitism," it was shown that follow- 

 ing an extensive attack by Orgyia leucostigma upon the shade trees of Washington, 

 which culminated in August, 1895, there was an extraordinary development of para- 

 sites. Thirty-five true parasites were reared, of which fifteen were primary hymen- 

 opterous parasites and six primary dipterous parasites, fourteen species being hymen- 

 opterous hyper-parasites. In the autumn of 1895 about 90 per cent, of the caterpillars 

 were destroyed by primary parasites, the vast majority of these being hymenopterous 

 and the bulk of the work being done by Pimpla inquisitor and Chalcis ovata. In the 

 spring of 1896 so many of these primary parasites had successfully hibernated that 

 they were in position to almost annihilate the first brood of caterpillars, already weak- 

 ened greatly in numbers by the extensive parasitism of the previous autumn. In the 

 later months of 1896, however, an extensive hyper-parasitism began to be effective, 

 and the principal primary parasite, Pimpla inquisitor, was almost killed off by its own 

 hymenopterous parasites and principally by Dibrachys boucheanus. Tertiary parasitism 

 was noticed at this time, but was not especially effective, and the Orgyia had begun to 

 recuperate in numbers at the close of 1896. Several careful accounts in July, 1896, 

 showed the percentage of parasitism to be 98.8 per cent., and the numerical details of 

 the parasites concerned were found in one instance to be as follows : 



On June 30 and July 8, 1896, 624 cocoons of the tussock moth were collected 



