PARASITES OF ANIMALS. 81 
cious spiral dilations of the oviducts, until hatched into small 
larve or maggots, when they are deposited by the mother, with 
almost unerring instinct, upon or near decaying flesh. The 
female flesh-fly (Sarcophaga carnaria Linn.), is said to de- 
posit at least 20,000 of these young larve. They are ready 
to commence feeding at once, and grow with remarkable 
rapidity, often becoming half an inch long in two or three 
days. When mature, they crawl out of the flesh and change 
to long-oval, brown pupa, in the earth or any other conven- 
ient place, and the mature flies come forth in a few days. 
By this rapid increase the progeny of a few pairs would in a 
short time devour the carcass of a large animal. The blue- 
bottle fly (Musca Cesar Linn.), the meat-fly (Musca vomi- 
toria Linn.), and others allied to them, are common and well 
known species, having similar habits. The larvee of all these 
are long, soft-bodied, footless maggots, smaller toward the 
head, thicker and blunt behind. The larva of the blue-bottle 
fly is represented in Figure 27. The eggs or larve and 
those of other similar flies are not rarely swallowed with 
food by men and animals, and are capable of living, for a 
time at least, in the stomach and intestine, sometimes giving 
serious trouble. To keep them out of wounds or sores, the 
old females should be kept away. If this cannot be done by 
bandages, frequently washing the wounds with a weak solu- 
tion of carbolic acid will be an effectual remedy and pre- 
ventive. 
PARASITES BELONGING TO THE HEMIPTERA. 
The parasitic Hemiptera are all degraded, and mostly 
wingless forms, belonging to three very different families: 
the Cimicide, including the bed-bug; Pediculide, including 
the true lice; and the Mallophagide, including bird-lice, ete. 
CIMICIDA. 
This family, as restricted by Westwood, includes only the 
genus Cimez, or the bed-bug and its allies. These have a 
smoothish, oval, flat body, with a broad metathorax; a small 
head ; a slender, threejointed proboscis or beak, which reaches 
as far as the front legs whe y, folded. down, and slender, four- 
ICFOSO: 
