6 BULLETIN 45, U. S. DEPAETMENT OF AGRICULTURE. 



The data appertaining to sheep numbered 3, 8, and 11 have been 

 omitted from the tables because these individuals were dipped on 

 June 13. 



Special observations were made on sheep No. 10. On June 20, 

 9 females and 3 males, collected by dragging, were scattered on the 

 back, neck, and head of this sheep. Most of the ticks went beneath 

 the wool immediately near where they were dropped. On the fore- 

 noon of June 21 a male and a female were found dead in the wool, 

 the female on the head and the male on the side. A female, nearly 

 dead, was also found in the wool on top of the head. The live ticks 

 attached were a male and a female on top of the head at a place 

 where the wool was very short. Six males and 12 females, collected 

 by dragging, were now scattered on the head, neck, and back. In 

 addition 1 female (one-twelfth engorged) which was picked from 

 a saddle horse was placed on the back of the sheep at the edge 

 of a spot where the wool had been worn short. In the afternoon 

 3 males were found dead in the wool on the back. These had never 

 attached. The one-twelfth engorged female was found dead and 

 shriveled about 8 inches from where it was placed, in heavy wool. 

 Eight males and 5 females, collected by dragging, were scattered on 

 back, neck, and head. On the morning of June 22, 3 males and 1 

 female were found dead in the wool. Two males were taken on the 

 shoulder and the other 2 ticks were taken from the head. None had 

 attached. The live ticks found attached at this time were 4 females 

 and 3 males, between the folds of heavy wool. Two of the dead ticks 

 that were removed were taken from a fold where 2 females and 1 

 male had attached. The attached ticks were scattered as follows : 

 2 females and 1 male in a fold near each other ; 1 male and 1 female 

 near each other in another place ; and 1 male and 1 female, each alone, 

 at still other places. All were in long wool. A male, barely alive, was 

 crawling at the edge of the short wool spot mentioned before. On 

 the forenoon of June 23, 2 females and 1 male previously found at- 

 tached were dead. These ticks were still attached when found. Two 

 dead males and 3 dead females were also found. These had never 

 attached. They were picked, 2 from the back, 2 from the head, and 

 1 from the neck. One of those on the back was a tick spoken of 

 before as barely alive. At this time 1 female was found slightly en- 

 gorged. A male was seen to be attached on the neck. A female loose 

 in the wool appeared entangled. In the afternoon of this day 1 

 females and 1 male, collected by dragging, were put on the head, 

 neck, and back of the sheep, as was also a male which had fed. All 

 ticks went quickly under the surface of the wool. On the morning 

 of June 24 the female that appeared entangled in the wool was dead. 

 Three males and a female were picked from the wool, dead. These 

 had never attached. Two females and 1 male were attached. The 



