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The method so long used of applying some oily or ill-smelling sub- 

 stance to stock for the purpose of repelling the flies has certain vir- 

 tues that should not be lost sight of, but a single application is of 

 such short duration and the objection to making such applications to 

 animals so common that if any other equally effective measures could 

 be brought out the former would become unpopular. 



Since the injury caused b} r horseflies is produced only by the adults, 

 a remedy for this stage is most desirable, and it is to be hoped that a 

 careful study of the habits of this stage may reveal points where suc- 

 cessful attacks may be made. Porchinski, of Russia, and Howard, of 

 this country, have already made a notable contribution along this 

 line; and besides, the habit which the adults of some species, at least, 

 have of collecting in certain situations seems to offer promise of good 

 results. In the few experiments I have made in this connection it 

 has been demonstrated to my satisfaction that it is possible to get 

 good results by system atically trapping the adults. 



Mr. Washburn stated that he had been requested to advise some 

 satisfactory remedy to prevent the attack of these flies upon horses in 

 the rural districts. In at least one place rural mail delivery had been 

 suspended at certain seasons of the year on this account, and he asked 

 if fish oil and lard or lard and kerosene had been found satisfactory 

 as a remedy. 



Mr. Hine replied that undoubtedly these materials were of some 

 value, but that they must be applied very often to the animals. 



Mr. Fletcher remarked that he had seen plowmen in plowing 

 matches in Manitoba spray their animals with kerosene emulsion, and 

 that this is more effective if a little carbolic acid is added to the mix- 

 ture. He knew of but one instance where animals treated with kero- 

 sene had been injured by the application. This was on rough, long- 

 haired animals. 



Mr. Washburn said that he had recommended for the horn fty a mix- 

 ture made of 1 pint of kerosene and 3 pints rancid lard, and that this 

 this worked well, the effect lasting twenty-four to forty-eight hours. 



Mr. Fletcher used 1 pound of pine tar in 5 pounds of lard, but few 

 people could be induced to use lard and pine tar on their animals, 

 although they were good remedies, for the reason that they left the 

 hair in a very dirty condition. 



Mr. Marten stated that kerosene could be used on the human scalf 

 if the hair is loosened up and left so that the material will evaporate 

 quickly. In case evaporation is retarded, injury is likely to follow. 



