ERADICATION OF THE ROCKY MOUNTAIN SPOTTED FEVER TICK. 3 



males from unfed males when they are dead. The headings under 

 " location of dead ticks on host's body " are self-explanatory. The 

 ticks taken from the head were usually in the wool on the top of the 

 head. The same statement also applies to the neck. The heading, 

 " total ticks found attached at first examination," is also self-explana- 

 tory. Only a few ticks were on the sheep at this examination. It 

 is likely that there were only a few ticks which had attached them- 

 selves and become detached before this examination, except those 

 which were found dead in the wool. The headings under " location 

 of living attached ticks " nee'd some explanation. The " other place " 

 referred to in the case of No. 1 was near the base of the right fore leg, 

 and in the case of No. 7 the tick was attached on the breast. Ticks 

 attached on the head were in all cases found attached in the wool. 

 No preference was shown by the ticks on sheep with heavy wool for 

 places where the wool was short. They attached both in short wool 

 and in long wool which was somewhat open. On the ram the ticks 

 attached in a bunch in the cavity where the horn ordinarily is located 

 (this ram was hornless). 



All the ticks attached on sheared sheep, except one, were in front of 

 the ears where the wool was thin; the exception was in the case of 

 one tick which was attached on the shoulders. 



