258 A TICK-RKSISTANT CONDITION IN CATTLE. 



24/6/16 : No mature ticks found ; " tear-drop "' type 

 of exudation present. 1918 : This cow had been running 

 with Mr, Fred Hull's milking herd at " Lonehand " for 

 some months. Examined at '" Lonehand '' 25th January : 

 only a few larvae were visible. On 5th February, Mr. Fred 

 Hull dipped his milkers with the exception of some five or 

 six resistant animals of his own and five (including Sweet- 

 briar), belonging to Mr. Munro Hull. No ticks were found 

 on this animal and she was taken home and from 6th- 11th 

 February, 1918, was examined twice daily, but no ticks 

 were detected on her. Fresh exudate was observed on 

 5th, 8th and 9th February. March 19th-24th : numerous- 

 larvae were found attached to udder and escutcheon but no 

 other 'stages were visible. Fresh exudate was observed 

 on the 19th, 21st, and 24th. June 7th : Not examined 

 carefully, but no ticks were apparent. 



Wallum, born August, 1913 : dam, Heatherbell. A 

 dark brindle Jersey strain, with dark yellow skin. (Con- 

 dition low and very ticky, December, 1915 ; perfectly 

 clean, June, 1916 ; slight exudate, Novem])er, 1916, — clean ; 

 slight exudate, May, 1917, — <;lean. Stock book). 



24/6/16 : Examined on return from several months 

 stay in a neighbouring ticky paddock^ — found to be free 

 from ticks — dry exudate was present. This cow was 

 examined daily from January 16th- February 11th, 1918, 

 and no ticks of any age were discovered on her. Fresh 

 exudate was frequently observed — on 16th, 30th January, 

 1st, 5th, 8th and 10th February. March 20th-24th : three 

 examinations were made but no ticks were discovered ; 

 fresh exudate seen on each occasion. Calved, April, 1918. 

 June 7th : no fully- matured female ticks were observed but 

 a fair number of immature ticks were noticed. No fresh 

 exudate was seen. 



Yellow 1 1, born 1912 ; dam, Yellow I. 



24/6/16 : A few engorged ticks as well as a number of 

 immature and maturing ticks. Substance resembling 

 exudate present. Sold, 1917. 



Yellow III, born, December, 1915 ; dam, Yellow II. 

 A light yellow Jersey with particularly short hair and a 



