49 



and feeds both on the apple-root louse, Eriosoma Pyri, and the grape-root louse Phylloxera 



Radicola. 



Tha Ostridce, Breeze or Bot flies. The more 

 common of these have already been described 

 by the writer in a former report. 



' ] ■-! 



Fig. 39. Syrphus Fly. 

 The Horse breeze fly, (Estrus Equi, Fab. 



Fig. 40. 

 Horse-breeze Fly. 



Tig. 40, male ; Fig. 41, female. 



The eggs ar^ laid on the hairs of the ani- — ■— ^ ^^^ Kg. 41. Female. 



TQal (See. Fig. 42), and being licked ofi" by the tongue, are thus conveyed into the 

 stomach of the horse, and attaching themselves to the sides of the stomach (see Fig. 43), 

 pass through this stage of 

 their existence. Another 

 fly, (Estrus hovis, Lat., 

 the ox-bot fly is shown 

 at Fig. 44, while at Fig. 

 45 is shown the flv just 

 emerging from its cocoon, 

 and a view is also given _ _ _ Fig. 42. Eggs of Horse-breeze Fly. 



highly magnified, of the ovipositor, or instrument, by which the female deposits her eggs. 



Fig. 43. Larvffi of Horse-breeze Fly. 



Fig. 44. Ox-bot Fly. 



The sheep bot fly, (Estrus Ovis, Linn, is shown at Fig. 46. This fly attacks the 

 nostrils, depositing her eggs there. 



All these bot and breeze flies are greatly dreaded by the animals they attack, and 

 their appearance causes great commotion amongst them, and very often produces a 

 regular stampede — the animals endeavouring by their terrified flight to escape their in- 

 sect tormentors. 



We now arrive at our last division of this section, the Muscidce. This is a large 



family, and contains a great number of species. The typical member is Musca domestica, 



the common house fly, and its history will be found more in detail in another part of 



this report. To its ranks belong the celebrated " Tsetze Fly," Glossina Morsitaris^ 



4 (en.) 



