INSECTS INFESTING DOMESTIC ANLMALS. 



CHAP. 



The Blaok Horse-tly (Tabaims atratus) 241 



The Horse Bot-fly {Oestrm cqtti) 245 



The Ox Bot-fly (Oentrus bovis) -^46 



CHAP. 



The Sheep Bot-fly (Oextrux nvij^) 247 



The Seab Mite (r'au-roptis eqtd) 248 



The Liver Fluke {Digtoina hepaticuiii) 249 



CHAPTER CCXLIV. 



The Black Horse-fly. (Cal.) 



( Tahaiiwi at rat v-^. — Fabricius.) 



Order, Diptera ; Family, Tabanid^. 



[Biting and annoying horses, cattle and other animals ; a 

 large black two-winged fly, having the back of the thorax 

 covered with a bluish-white powder, and the wdngs smoky 

 dark brown or black.] 



Fig. 360.— Black 

 Horse-fly, Larva 

 and Pupa; a, the 

 larva — color, green- 

 ish-white ; h, the 

 pupa—color, brown; 

 r, the fly — colors, 

 black and bluish- 

 white. 



The body of this 

 fly (Fig. 360c) is 

 about ten lines 

 long, and the wings 

 expand about two 



inches. Like the mosquito, it is only the females which 

 attack animals ; the males are destitute of mandibles, and 



