PARASITOLOGY. 75 
numbers to produce the acute symptoms of tick fever 
by the eleventh day. The liver becomes congested, 
the bile thickened and granular; the spleen becomes 
greatly enlarged, and the contents is the consistency 
of blackberry jam. The urine is port wine colored, 
and the cancellated portion of the bone is black; the 
fat is lemon colored, due to staining of the cells of 
the tissue with hematin. During this time the ani- 
mal shows loss of appetite, stands off by itself, back 
arched, high elevation of temperature, accelerated 
respiration and pulse, port wine colored urine. 
Ticks do not live over winter in latitudes where 
the temperature falls to zero or below. 
Certain animals devour ticks, and hence aid in the 
ridding of such pests. These animals known to be 
enemies of ticks are: Kingbirds, “Jackdaws,” poultry, 
ants and Sowbugs (armadillidium vulgare). 
The arsenical cattle dip is made as follows: Arsenic 
(A So,), 8 to 12 pounds; sol soda, 24 to 45 pounds; 
water, 500 gallons. Tiwo dippings are necessary. 
Emulsion of crude petroleum: Hard soap, 1 pound; 
soft water, 1 gallon; Beaumont crude petroleum, 4 
gallons. When ready to use add 3 gallons water to 1 
gallon of mixture. 
Pasture rotation is also used to rid cattle and pre- 
mises of ticks. 
BoorHiLus AUSTRALIS (Australia). 
Synonym.—Australian fever tick. 
History.—Found in Australia, South America, 
Cuba, Porto Rico and India. 
Animals Intested.—The ox, the deer and the horse. 
Description.—The female is about the same size as, 
and has markings similar to, the Bodphilus Annula- 
