115 



Tiie entomolof^^ists of this Board have recently been investi- 

 gating^ the result of the introduction and distribution of the 

 parasite {Eucoila impaticns) of the "Horn fly," which Prof. 

 Koebele sent this division from Arizona, and I am pleased to 

 report that it appears to be establishing itself. This parasite 

 has also been noticed by other entomologists, so we feel confi- 

 dent that It will eventually be found wherever colonies were 

 sent during the past season, and that it will be eiTective in re- 

 ducing the number of that annoying stock pest. This parasite 

 will h'.^ found illustrated on page 147 of your report. This Di- 

 vision has commenced a systematic inspection of the neighbor- 

 hoods where all of Prof. Koebele's "Horn fly" parasites were 

 distributed, and will shortly report further as to the result of 

 the investigation. 



I beg to call your special attention to th.e recommendation 

 made in my report of 1905 regarding the "Introduction of Bene- 

 ficial Insects." I respectfully ask that the subject be brought 

 before the present Legislature for action. I quote the follow- 

 ing from the Report above referred to : 



"Through the efforts of your Honorable Board, several spe- 

 cies of internal parasites and predaceous insects for the sup- 

 pression of our destructive species have been introduced, and 

 from examination we feel hopeful that they will come up to 

 our expectations. As Mr. Kotinsky, my assistant, has referred 

 to this work in detail, it will not be necessary to take this mat- 

 ter up further than to suggest that you bring this important 

 work before the attention of our Territorial legislators urging 

 ihem to make a liberal appropriation . . . so as to enable 

 vou to further continue the search for such friendly assistants 

 to our agriculturists. There is positively no danger from the 

 intelligent introduction of such insects that prey upon injurious 

 species, for their stomachs will no more digest vegetable mat- 

 ter than that 01 a lion's or tiger's will. Such insects when 

 once introduced are constantly working without pay in the in- 

 terests of our farmers, planters and, in fact, all lovers and' cul- 

 tivators of trees and plants, not even exacting a portion of 

 our crop as their part. What all this means can be gleaned 

 from the introductory remarks or statement of this report of 

 the enormous loss by the depredations of insect pests. It is 

 the introduced injurious species that prove to be such formid- 

 able ones, as they are usually brought into new countries with- 

 out their more highly-bred, natural checks, which can generally 

 flv away during the time occupied in the transportation of the 

 plants. This way of fighting our insect enemies is not any 

 longer an experimental one, but has saved millions of dollars 

 of property, besides retaining the value of adjoining property 

 already improved or unimproved. Not only is our farming 

 population increased, but our merchants, tradesmen and bank- 



