BY T. HARVEY JOHNSTON" AND M. J. BANCROFT. 263 



found ou close scrutiny and an occasional matured female 

 was removed. On 28th January, 1918, and again on 10th 

 Tebruar}', some tiny dr}' patches of serum were found on 

 the escutcheon. Mr. Hull had noticed exudate on this 

 heifer previousl}'. tliis l>eiug the youngest subject on which 

 he has observed it.* 



Rosewood heifers. 



Six heifers were loaned by Mr. A. W. Johnston, Cow- 

 leigh, Thagoona, near Rosewood, as controls, their arrival 

 at Eumundi being witnessed by one of us on October 18th, 

 1917. Theseauimals ran in Mr. Hulls paddocks Anth the 

 rest of his stock until June 17th, 1918, when they were 

 Teturned to their owner. 



One (Brand J.4.V.) died early in January. We found 

 that the remaining five shewed varying degrees of infest- 

 ation, becoming progressively cleaner in the following 

 order :■ — 



Brand T.3.0. No. 1 red and white "] 



,, T.3.0. No. 2 red and black V ticky 



,, R.O.8. No. 1 red J 



,, R.0.8. No. 2 red and Avhite ) comparatively 



,, J.4.V. No. 1 red j clean 



These heifers were examined from time to time (on 

 11 occasions) from January 17th- February 11th, 1918. 

 With the exception of J.4.V.. it was impossible to examine 

 any of them thoroughly, the two branded T.3.0. being 

 especially Mild. 'The fact that there was no crush or 

 facilities for handling such animals, made it impossible 

 to collect all the mature female ticks present at any one 

 time. 



The two branded T.3.0. were ticky throughoiit the 

 •Januarj'-February examinations, shewing big patches of 

 fuUj'-matured females on escutcheon, shoulders and in the 

 ears. March 18th and 22nd : these tAvo heifers were 

 carrying a large number of mature ticks. On March 25th 

 the number of mature females was considerabh' less. June 

 7th : mature females were less numei'ous. 



*Mr. Hull reports (11th Nov., 1918) that of the young stock mentioned 

 aboyo. Squib, Bally, Bunting, Banksia and Bramble are now resistant. 



