25 



The method so loiiu' used of applying; sonic (»ily oi- ill-sincllinj^ sul)- 

 staiice to stock for tlie imiposc of repollinjx tlic IIU'S lias cci-taiii vir- 

 tues that slioukl not be k)st si;j:ht of, but a sini^h' api)lieation is of 

 such sliort duration and llie object ion to making sucli appUcalions to 

 animals so common that if any other equally effective measures could 

 b(^ brought cut tlu^ former would become uni)opular. 



Since the injury caused b}' horseflies is produced oidy by Ihc adults, 

 a i-emedy for this stage is most desirable, and it is 1o be hoped iliat a 

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

 cessfid attacks maybe mad(\ Porchinski, of Russia, and llo\vai-d, of 

 this country, have already made a notable contribution along this 

 line; and bt'sides, the habit which the adults of some species, at least, 

 have of collecting in cei'tain situations seems to offer promise of good 

 results. In the few exi)eriments I have made in this coniu'cfion it 

 has been demonstrated to my satisfaction tliat it is possible ro get 

 good results by systematically trap])ing the adidts. 



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

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

 the rural <listricts. In at least one iilace rural mail delivery had been 

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

 if fisli oil and lard or lard and kerosene had been found sati.sfaetory 

 as a reme<ly. 



Mr. Iline replied that undoubtedly these materials were of some 

 value, l)ut that thej' must be applied very often to the animals. 



Mr. FletclK'r remarked that he had seen i>l<)wmen in plowing 

 matches in Manitoba spray their aiumals with kerosene emulsion, and 

 that this is more effective if a litth' carbolic acid is addctl to the nux- 

 ture. He kn<»w of but one instance where animals treated with kcro- 

 .sene liad been injured by the ai)[)licat ion. This was on i-ough. l(»ng- 

 hair<'<l animals. 



Mr. \Vashl)urn said that he had recommended for the horn tly a mix- 

 ture made of 1 i)int of kerosene and '■) pints rancid lard, and that this 

 this worked well, the ctrecl lasting twenty-four lo forty-eight lioui-s. 



Mr. Flelchei- used i pound of pine tar in •*) i)ounds of lard, but few 

 people could be induced to use lard and ])ine tar on their animals, 

 although they were good renu'dies, foi- the reason that they left the 

 hair in a very dirty condition. 



Mr. Marten stated tliat kei'osene could be used on the human scali 

 if tlie hair is IoosciumI up and left so that the material will eva[)oi-at< 

 quickly. In ease evaporation is retarded, injury is likel\ to follow. 



