202 PARASITOLOGY. 
The inguinal lymph glands which receive the lymph 
from these parts become swollen; later, fibrous de- 
generation may take place both in these glands and 
the testicles; the testicles may contain cavities of 
caseous pus; there may develop ulcerous patches on 
the penis, sheath and vulva. In later stages the 
nerve tissue, kidneys, lymph glands and other or- 
gans become infested. 
‘TRYPANOSOMA EQUINUM. 
Distribucton.—Found in Brazil, Paraguay, Bolivia 
and Argentine Republic. 
Description.— This protozoon has the same general 
appearance as the trypanosoma Brucii, and multiplies 
in like manner. It measures from twenty-two to 
twenty-four microns long and about one and one-half 
microns broad. 
Life Cycle.—It passes through the same changes 
as the preceding species. The animals probably be- 
come inoculated by blood-sucking flies. 
Animals Infested.—The horse and, by experimental 
inoculation, ox, sheep, pig and dog. 
Part Infested.—The blood. 
Disease Produced.—Mal de caderas; disease of 
hind quarters; flagellosis of equidae. 
Symptoms.—High elevations of temperature; the 
animal becomes weak and sluggish. The weakness 
is greatest in the hind quarters. Later he sways 
from side to side; scarcely able to move; gradual 
emaciation; down, unable to rise; death. 
TRYPANOSOMA LEwIsI (Lewis) 
Distribution.—Found in Cuba and other countries. 
Description.—It somewhat resembles the other 
