My son-in-law, Dr. Vanlair, informs me that citric acid or the juice of lemons is efficacious in destroying these insects. Injections of this acid are thrown into the nasal fossæ.
At Brazil, in the province of Minas Geraes, they give the name of Berne to a fly which attacks man and cattle from the month of November until February. It deposits its eggs in the loins, the arms, the legs, or even the scrotum, without the victims perceiving it, and their presence is first shown by a redness, then by a sensation of itching, and a swelling with the formation of pus.
Among those insects which suck the blood, is one which is known by every one, the Breeze-fly, Tabanus bovinus. Happily it seldom attacks any animals except oxen and cows. We give a representation of the insect, the parts of the mouth, and one of the antennæ.
In the same order of diptera are found ordinary flies, among which may be easily distinguished the three species
which are here represented, and which differ as much by their external characters as by their mode of life.
Fig. 11.—Ox-fly.
