Common Parasites 



size of a honey bee, has large green eyes and an elongated abdomen. 



It visits horses during 

 hottest part of day for 

 the purpose of suck- 

 ing blood. To protect 

 horses keep in shady 

 places, in darkened 

 stalls or covered with 

 fly nets. 



Large Black Horse 

 Ply (Tabanus atratus). 

 A large black fly near- 

 ly an inch in length. 

 Visits horses for the 

 purpose of sucking 

 blood. Use protective 

 measures as advised 

 above. 

 Stable Fly (Stomoxys stabulans). This fly is sometimes known 



as biting fly and stinging fly, and in appearance closely resembles 



FIG. 97. Tabanux atratus: a, larva; l>, pupa; c, adult (after 

 Riley). 



Fio. 112. Stom/ury* calcitrans: Adult, larva, puparium, and details enlarged (original). 



the common house fly. The eggs are laid in fresh manure and go 

 through the forms of larva or maggot, pupa and adult. Both 

 larval and pupal stage are spent in manure or moist, rich earth or 

 other refuse. The bite of this fly is severe and often causes severe 

 sores difficult to heal. The mature fly has been charged with in- 

 fecting animals with the germs of Anthrax, Glanders and other dis- 

 eases and has also been charged with carrying hook worm larvae 

 and contaminating human food with them. 



