PARASITOLOGY. 23 



History. — Distributed throughout the world. It 

 was first described in 1761 by Linnaeus. 



Descriptio7i. — The fly is about the size of the musca 

 vomitoria, and is grayish in color. Its markings 

 are similar to those of the house-fly. 



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. 



Glossina Morsitans (Glossus — tongue; Morsitans — biting.) 



Syno7iym, — Tse' Tse' fly. 



History. — It is found in swamps and river-bottoms 

 in Central Africa. 



Descriptioji. — It is a little larger than the common 

 house-fly. The piercing stylet of its proboscis is 

 barbed, and is twice as long as its head. 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 protozoon lives in the 

 blood; high elevation of temperature — 104° to 106.5°; 

 anemia; oedema in region of 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 membranes; 

 atrophy of fat tissue and muscular structure. 



