BY T. HARVEY JOHNSTON AND M. J. BANCROFT. 257 



JuiU' 24th, 1916 : A few engorged ticks present. 

 This cow M-as examined daily from Janxiarv 16th - 

 February 11th, 1918. Males, half-bloated females, nymphs 

 and larvte Avere ol>served frequently . On the morning 

 •of January 18th, larva' from tube II (hatched, 4/1/18) 

 ^were applied to the escutcheon. The majority had dis- 

 appeared on the following day. Matiire females weie re- 

 moved from time to time making a total of 39, but from 

 ^th-llth February when the artificial infestation might be 

 supposed to ])e developing, only two fully-matiired females 

 were found. Fresh exudate >vas observed on 17th, 25th, 

 26th, 31st January. 8th, 9th and 10th February. March 

 19th-24th : Males and nymphs Avere very numerous and 

 •over 70 matured females were removed in five exarain- 

 Ations ; many of these were, however, extremely small. 

 No fresh exudate was observed. June 7th : immature ticks 

 fairly numerous, but infestation not so heavy as in March. 



tSnailie, bought at TeAvantin 1913. 

 24/6/16 : Tick-free, exudate present. 



Sunfiet, bought from H. Bull, TeAvantin, 1912. A retl 

 aiul Avhite coav Avith rather long hair and Avhite skin. (Very 

 ticky, — inoculated from resistant animal. Clean 28/2/15 ; 

 •Condition good, clean, exudate, March, 1916. Stock book). 



24/6/16 : Examined immediately on return after 

 •seAeral months stay in a neighbouring ticky paddock, — 

 found to be free from ticks, exudate joresent. This cow 

 A\'as examined daily from JanuarA' 16th - February 11th, 

 1918. Males, unbloated females and nymphs could always 

 be discoA'ered on close examination and fully- matured 

 females Avere reraoA'ed from time to time, making a total 

 ■of 18 during that period. Fresh exudate was noticed on 

 January 17th and February 9th. March 19th-22nd : 

 traces of recent extensive exudation AAere obserAed on the 

 t^scutcheou and seA'eral mature females AA-ere remoAed. 

 Sold April, 1918. to H. Clem, Eumundi, Avho reported 

 (October, 1918) that he had neA'er dipped or sprayed this 

 ■cow, since only a feAA' small ticks had been noticed on her. 



Siveethriar, born June, 1910 ; dam. Bluebell, sire, Don 

 (Jersey). A black and Avhite cow, AA'ith yelloAv skin and 

 short fine hair. 



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