PARASITOLOGY. 23 
History.—Distributed throughout the world. It 
was first described in 1761 by Linnzus. 
Description.—The fly is about the size of the musca 
vomitoria, and is grayish in color. Its markings 
are similar to those of the house-fy. 
Life Cycle.—The female is viviparous; lays the 
larvae on fresh meat or in the wounds of animals. 
The fully developed larvae seek a secluded place 
and in a few days pass through the pupal stage. 
Gtossina Morsitans (Glossus—tongue ; Morsitans—piting.) 
Synonym.—Tse’ Tse’ fly. 
History.—It is found in swamps and river-bottoms 
in Central Africa. 
Description.—It is a little larger than the common 
house-fly. The piercing stylet of its proboscis is 
barbed, and is twice as long asitshead. The thorax 
is orange colored, with four black lines on the dorsal 
side. The abdomen is yellowish white and the wings 
are dark in color. 
Animals Attacked.—All animals except the ele- 
phant, zebra and hen are attacked. It pierces the 
skin instantly, drawing blood. It inoculates the an- 
imal with the Trypanosoma Brucii, the protozoa 
producing Nagana. 
Condition Produced.—The protozodn lives in the 
blood; high elevation of temperature—104° to 106.5"; 
anemia; oedema in region ef the head, neck and 
abdomen; nasal catarrh, conjunctivitis, etc. 
Post Mortem Findings.—Enlargement of lymph 
glands and liver; spleen dark colored and friable ; 
petechia and hemorrhages in the serous membrauies ; 
atrophy of fat tissue and muscular structure. 
