120 ANIMAL PARASITES AND MESSMATES. 



soldier threw up with his spittle more than two hundred 

 larvae of this fly. We give below the figure of the larva 

 and of the perfect insect. He had found this man sick 

 in Michoacan, at a height of 1,866 metres, between 

 Mexico and Morelia. 



Fig. 9. — Lucilia hominivora. Fig. 10.— Lucilia hominivora, larva. 



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 fossae. 



At Brazil, in the province ol 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 sensa- 

 tion 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, Tahanus hovinus. 

 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 antennae. 



In the same order of diptera are found ordinary flies, 

 among which may be easily distinguished the three spe- 



