PARASITOLOGY. 63 
ical in shape and composed of five articles each. 
The free extremity of the last segment of each leg 
is provided with an ambulacrum. (An ambulacrum 
is a cup-shaped sucker attached to the extremity of 
the leg by a pedicle.) The adult is provided with 
four pair of legs; the two anterior pair are located 
on the anterior third, and point forward; the two 
posterior pair are located on the posterior half, and 
point backward. 
Animals Infested.—They infest the air-sacs of fowls 
and pheasants. They are white in color and can 
be seen macroscopically as small bodies, very mi- 
nute in size. They even reach the air cells of the 
bones. 
Condition Produced.—Their irritation causes inflam- 
mation and results in death of the host. 
TREATMENT OF SCABIES. 
Large bunches of cattle and sheep which become 
infested with scab parasites must of necessity be 
dipped. For this purpose the dip which has proved 
the most successful is the lime and sulphur dip. 
The lime acts as a solvent for the sulphur. The 
sulphur is a parasiticide. This dip is made in the 
following proportion: 
Unslaked lime____----____-___ 8 pounds. 
Sulphutuccccessse sees essce5, 24 pounds. 
Water so o..2co Uo See Sobek 100 gallons. 
Boil for two hours. Use at a temperature of 100 
degrees to 110 degrees Fahr. Keep the animalin the 
dip two or three minutes by the watch. Clean the 
sheds or barns and yards. Disinfect the fences, 
stalls, racks, and feed troughs with the sediment of 
