254 A TICK-RESISTANT CONDITION IN CATTLE. 



11th, 1918. No ticks of any description were found on her. 

 Fresh, exudate appeared only once, on January 17th. 

 Calved, January 26th. March 18th-24th : a few tick sores 

 were visible on the escutcheon but the animal appeared 

 perfectly free from ticks. June 7th : one mature female 

 tick was removed and a few immature ticks were visible. 

 No exudate present. 



Rainbow, bought from Luke, Eumundi, 1912. Black 

 Jersey mth yellow skin. (Clean, 28th February, 1915 ; 

 condition good, exudate evident, January, 1916 ; condition 

 good, no exudate, February-May, 1916 ; condition good, 

 exudate, November, 1916 ; condition good, slight exudate. 

 May, 1917. Stock book.) 



On 24/6/16 free from ticks ; exudation present. 

 Examined, January 16th, 1918. Calved, January 20th. 

 Examined twice daily from 21st January- 11th February. 

 During this period four fully-matured ticks were removed. 

 Males, nymphs and larvae were evident on man}' occasions. 

 Fresh exudate was observed on February' Sth. Sold March, 

 1918, to G. B. Wells, Eumundi. 



Redwing, born, 1914 ; dam, Snailie. 



On 24/6/16 a solitary engorged female and a few young 

 ticks were seen — neither tick sores nor exudations were 

 observed. Sold, 1917. 



Rhinca, born, 1910 ; dam, Jessamine. A yellow 

 Jersej^ with a white face ; yellow skin. 



24/6/16 : Two engorged ticks found, a few immature 

 parasites present. 



January, 1918 : this cow had been running in a large 

 paddock (JVIr. Finch's) opposite '' Cudgeree " with ordinary 

 stock for almost twelve months. She was in good con- 

 dition and not being milked during January and February, 

 1918. Four examinations were made. On one occasion 

 one poorly developed female tick and several nymphs were 

 found on the ear and shoulder ; while on the other occasions 

 no ticks could be found. Fresh exudate was observed 

 once ; the dry scales were seen on two other occasions. 

 On 24th January, a number of Mr. Finch's milking stock 

 were examined and found to be grossly infested with ticks ; 

 Mr. Finch had been unable to dip for over three weeks owing 



