102 



DllTHRA OF .MINNESOTA. 



troduction of ticks and otli'jr ])arasites. Dipped sheep should not 

 be returned at once to the same ])en or enclosure occupied before 

 shearing or dipping-. l)ut should hu allowed to remain for a while 

 in a different enclosure to prevent reinfestation. \\'ool, if infested 

 when clipped, should l)e stored at a distance from the sheep in order 

 to be sure that no ticks escape from it and return to the animals. 

 A second dipping: should be given about twehe days after the first. 

 However, a careful examination of a few shee]) will determine 

 whether there are enough ticks on them to call for this. Dipping 



for ticks, as al):)ve. will at the same 

 time kill lice and man}- other ex- 

 ternal parasites : a thorough spray- 

 ing of the nens or other enclosures, 

 with zencleum of the strength given 

 above, or with kerosene emulsion, 

 will kill all wandering ticks or 



Fig. 15S. Vuung lai-va and puparium with niangC UlitCS and mOSt OtllCr VCr- 

 breathing pores, of sheep tick. Greatly . "" . ,.,,,. 



enlarged. Lugger. mill, aud IS a desirable thing to do. 



A winged form of Hippobuscid, H. equina, lives on the horse; 



another, Lipoptcna ccni. on the Uritisli red deer. The members of 



lig. lo.t. llursetick. 



l-'orcst I'ly. Lugger. 



