342 BOARD OF AGRICULTURE. 
no reliable advice can be given as to the modes in which the 
spreading of the disease can be best prevented. It is most 
probable, however, that the eggs are hatched in water or 
moist earth,and that the young worms are swallowed directly 
by the hogs while drinking. 
Although this parasite probably does not live in the human 
body in any stage of its growth, there can be no doubt but 
that the pork and lard from hogs infested by them must be 
unwholesome. That such diseased pork is constantly sold in 
our markets is certain. 
The Human Bot-fly (Dermatobia noxialis ?). 
In the last report, (page 95), it was mentioned that a 
species of bot-fly lives in the larval state beneath the human 
skin, forming painful tumors. But such instances had been 
observed only in the tropical parts of Central and South 
America. It is, therefore, of interest to record a similar case 
in the United States. In this instance, a young woman, 
twenty-two years old, residing at Meridian, Mississippi, was 
the victim of the insect. The larve, developed from eggs 
deposited in the skin by the fly, caused great irritation and 
pain in the sub-cutaneous tissues, resulting in large abscesses, 
from which the mature larve ital escaped. 
I am indebted to Dr. Wm. B. Fletcher, of Indianapolis, 
Ind., for a specimen of the larve of the insect which was 
taken from this patient and sent to him by Dr. Jas Hughes, 
who treated the case. Whether it be identical with the South 
American species cannot be determined from the larve alone. 
