•1 



and feeds both on the apple-root louse, E r iosoma 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. Syrpmis Fly. 

 The Horse breeze fly, (Estrus Equi, Fab. 

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



The eggs are laid on the hairs of the ani- 



Fig. 40. 

 Horse-breeze Fly. 



Fig. 41. Female. 



mal (See. Fig. 42), and being licked off 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 bovis, Lat., 



the ox-bot fly is shown 



at Fig. 44, while at Fig. 



45 is shown the fly just 



emerging from its cocoon, 



. ° 5 • , . Fig. 42. Eggs of Horse-breeze Fly. 



and a view is also given & D& 



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



Fig. 43. Larvae 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 chese 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 Morsitans, 



