BY T. HARVEY JOHNSTON AND M. J. BANCROFT. 253 



while a typical exudation oecnrred on January 17th, 23rd 

 and 24th. This cow shows tick blisters as well as the typical 

 exudate. Calved on February 2nd. On March 21st and 

 22nd this cow was examined ; the escutcheon was covered 

 with larvae and nj'mphs while three mature females were 

 removed on 21st and 13 on 22nd. On June 7th, large 

 tick sores were visible on escutcheon ; small ticks numerous ; 

 fullj'-matured females fairly numerous. The tick resisting 

 power of this animal apparently had undergone diminution. 



Peewee, bought from M. Bourke, Rosewood, 1911. 

 Black Jersey with white belly. (This cow was running 

 with Finch's milkers (a ticky herd) from October, 1916- 

 May, 1917, during which time she was never dipped and 

 remained free from ticks. Stock book). 



On 24/6/16 a few mature and immature ticks were 

 seen on escutcheon ; also some tick sores but no definite 

 exudation ; the body was free from ticks. 



Although this cow was examined regularly from 

 Januar}^ 16th- February 11th, 1918, being a milker for the 

 whole period, there is very little to report about her con- 

 dition. She remained consistently clean throughout. 

 Males and immature stages were occasionally seen, a few 

 unbloated females were observed on the escutcheon on 

 January 31st and February 1st, while a fully-matured 

 female was removed on February 9th and another on 10th. 

 There was no exudate visible during this period. March 

 19th -24th: this cow was examined four times, males, 

 nymphs and larvae being found but no mature females. 

 Fresh exudate was seen on 22nd and 24th. June 7th, 

 examination disclosed a few unbloated females scattered 

 over the body. 



Primrose, born May, 1909 ; dam, Spot, by Jersey bull, 

 A light yelloAv Jersey with yellow skin. (No ticks, 1914 ; 

 condition low, few ticks, December, 1915 ; sprayed, January, 

 1916 ; clean, condition improved ; exudate, February, 

 1916; tick sores, March, 1916; exudate, March, 1916; 

 exudate pronounced. May and June, 1916 ; remained clean 

 and in prime condition. Stock book). 



On 24/6/16 free from ticks ; exudate abundant on 

 ■escutcheon. Examined daily from January 16th- February 



