entomologist'^ report. 121 



First — "Gnat oil," made as follows : Crude carbolic acid, 1 ounce; penny- 

 Toyal, i ounce ; sulphur, \ pound ; crude cotton-seed oil, 1 gallon. 



Mix well and apply with a brush or cloth to the back and shoulders of the 

 cattle. The crude-cotton seed oil is cheaper than the other oils, although fish oil 

 or lard oil is equally as good in making the above. 



Second — Fish oil and tar mixed and applied as above is equally effective. The 

 tar is mixed with the fish oil so that the odor may last longer and thus keep the 

 flies away from the animals a greater length of time. Either of the above will 

 keep the flies away from the animals for several days, after which the application 

 should be repeated. 



Third—The flies breed in fresh manure. It is thus important that the barn- 

 yards be kept as clean and free from manure as possible. Lime placed upon the 

 jnanure will kill the larvae. 



Howard Evarts Weed, 



Entomologist. 

 Agricultural College, Miss., June 15, 1893. 



