144 



] Family Oestridae (Bot-flies or Warble-flies). The larvae or 

 " bots " are important internal parasites of animals and .Man. 



Examples, Hypoderma bovis (The Ox \Varble-fly) 

 and H. linearis attack Man. in Europe 

 (Sweden) and America, causing " creep- 

 ing disease " (peculiar eruptions of the 

 skin due to the migratory activities of 

 the " bots " beneath it). 



Oestrus ovis (The Sheep Nasal-fly). In 

 Algeria it attacks Man, causing " thirn, 

 ni," a form of myiasis. The term 



//////'r/.s/.s signifies the various symptoms 

 and lesions produced by parasitic larvae 

 or maggot . 



Family Muscidae. Flies of the house-fly type. 



*C!roup I. The " biting " and blood-sucking Musc.idae. 



Examples, *Stomoxys calcitrans (The Stable-fly). 

 Resembles the common house-fly, but 

 has a stiff awl-like proboscis projecting 

 horizontally in front of the head. Is 

 suspected as a carrier of pathogenic 

 organisms, e.g., anthrax. 



*Glossina palpalis (The Dusky Tsetse-fly). 

 West and Central Africa. A stiff awl- 

 like horizontally-projecting proboscis. 

 During repose the wings are folded flat 

 over the back, like a closed pair of 

 scissors. The principal carrier of Try- 

 /Httiosomagambiense which causes "sleep- 

 ing sickness" in Man. (Sec j></c 4:5, 

 /'art L, " Catechism," Zoology). 



*Glossina morsitans. The carrier of Tri/- 

 pdiioxuniu hrnci-i, which causes " nagana " 

 in domesticated animals, and T. rlio- 

 ti<xi<iix( \\hich produces a form of 



" sleeping sickness in N\ assaland 



and N.E. Rhodesia. (NVr j, ige 43, 

 Part /., " C-atechism" Zoology.) 

 *Philaematomyia. Central Africa, India, 

 Cyprus. Proboscis retractile and con- 

 sisting of a hard proximal portion with 

 cutting teeth and a soft distal portion 

 for sucking. Attacks Man and animals. 



*Group II. The non-biting, blood sucking Muscidae. Feed on 

 serum from sores,' and suck blood oozing from wounds 

 made by " biting " flies. Potential germ-carriers. 



