22 PARASITOLOGY. 
The head is yellowish or reddish in color. The 
thorax and abdomen are covered with short, stii 
black hairs. 
Lite Cycle.—The time at which the fly appears de- 
pends upon the latitude. In Texas and Louisiana 
they appear in June andlast tillautumn. The female 
lis oviparous, and lays as many as 200 eggs at one 
laying. The larvae invade the wounds of animals, 
and also decaying matter. The eggs hatch in about 
nine hours, and the larvae develop rapidly. The 
head part of the larva is provided with two teat-like 
projections, and two hooklets. The segments are 
also provided with hooklets. Its general appearance 
is like that of a screw, from which it gets its name 
(serew-worm). In the wound they are found bur- 
rowing into adjacent tissue, with the posterior ex- 
tremity upright. While these are developing other 
eggs are laid in the wound. The pupae are brown 
in color, and about two-fifths of an inch in length. 
The pupal stage is passed in the ground, in ten days. 
Treatment.—Chloroform injected into the wound 
will destroy them; also creolin or carbolic acid 
solutions. Curet or forceps may be used in remov- 
ing them. The wound can then be treated with the 
zinc and lead solution, made as follows: 
BR Zine sulph___._._----_-_-_____- Svi 
Lead, acetate__._____________- Si 
Wratet soso Fe Oi ha Se Oi 
SARCOPHAGA CARNARIA (Sarcophagous—flesh-eating). 
(Carnivora—dead meat). 
Synonyms.—Flesh-fly; gray carnivorous fly; car- 
nivorous sarcophagus. 
