THE CANADIAN KNTOMOLOGIST. 171 



behind in the importation of fruit and ornamental stock upon wliich the 

 scale has occurred. The overwhelming success that followed the 

 introduction of the Australian lady beetle. Novius cardi?ialis, and the 

 suppression of the Cottony-cushion scale might not again be repeated in 

 the case of the San Jose' scale, as, in case of a successful introduction of 

 its natural enemies, its wide diffusion over the country would render its 

 suppression much more difficult, but it would now seem that we have in 

 our possession information enough to indicate very strongly that in 

 ]?i\)-^\\ Aspidiotiis perniciostis has natural enemies, which, if brought to 

 this country and distributed in infested orchards and places where the 

 scale exists, would sooner or later overcome this pest and hold it in 

 check thereafter. \\'e have accomplished this once and saved from ruin 

 an immense industry, starting with even less prospects of success than we 

 now have in the case of the San Jose scale. A competent entomologist 

 located in Japan, for perhaps a year, would solve the problem, as 

 within that time he would be able to study the San Jose scale and its 

 enemies over a considerable area of country, and if such enemies were 

 transmittible, and we have no reason to suppose that they are not, 

 arrangements could be made to have them transmitted in quantity to the 

 various Experiment Stations in this country in the States where the scale 

 is known to occur. From a scientitic standpoint, there does not appear 

 to be a single significant obstacle in the way of again carrying out this 

 plan of introducing from a foreign country the natural enemies of an 

 insect that has been introduced with the plants upon which it depredates, 

 while these natural enemies, owing to their habits, have been left behind. 



Financially speaking, there ought to be no question as to the value 

 to the country of the benefits to be derived from this importation, in case 

 it is found to be practical. Even if it should fail, which must be 

 reckoned among the possibilities, but not by any means among the 

 probabilities, the financial loss would be but a mere bagatelle for either 

 Canada or the United States, or even a single State, for that matter. 



The total expense of sending Mr. Koebele and myself to Australia 

 (See reports U. S. Commissioners to Centennial Exhibition at Melbourne, 

 1888, p. 78) in 1888-89, exclusive of salaries, was exactly $1,694.97. 

 With $2,000 or $2,500 at his disposal, an entomologist would be able to 

 accomplish all that I have indicated, provided, of course, that he was 

 already a salaried officer and his pay was continued by the institution 

 with which he was connected- There are two widely separated town- 



