SCIENCE AND INDUSTRY. 
Under the heading Woolooga, there is included the Woolooga Hill 
station. 
Prrtop A (Minimum). 
—— Brisbane. Woolooga. Toowoomba. | West Burleigh. 
Janu ary .: 28 29 38 17 
February .. 23 33 38 19 
March 38 30 64 31 
April 42 59 No data 81 
May No data 89 No data 87 
June No data 90 No data No data 
July 70 67 No data 95 
August : No data No data No data 90 
September No data 34 No data 49 
October No data 36 No data 37 
November. . 25 No data 42 26 
December 36 30 No data 20 
From the data collected from these four stations it was found that :— 
(1) The conditions. which govern tick development are fairly 
similar in Brisbane, and in the Wide Bay and Burnett 
districts (e.g., Woolooga). 
(2) They are more congenial in the coastal districts of South- 
eastern Queensland (e.g., West Burleigh), and hence 
development may occur more rapidly—this being no doubt 
due to a moister atmosphere during the tick season. 
(3) In the Darling Downs (e.g., Toowoomba), the cold winters 
practically obliterate the tick, as no results were obtained 
(4) The most rapid development of the e 
from experimental plots from April until August. 
were not available until November. 
from plots laid down. 
Ticks 
During the hot, dry 
weather (November to January), no larve were obtained 
ge occurred in all 
centres in the case of ticks dropped during December, 
January, and February, especially during the two latter 
months. Thus the hot, moist conditions of a typical 
Queensland summer greatly favour tick development, 
whereas hot, dry conditions are quite unsuitable. 
{5) During the winter, very few of the ticks in the plots gave 
rise to larvee, and in cases where such were hatched out, 
there was a great lengthening of the period. 
greatly hinders development, especially when the weather 
is dry also, this being the common condition in South- 
eastern Queensland during winter. 
Cold, then, 
(6) The shortest periods encountered were 17, 18, 19, 20, and 21 
days (once each), all at West Burleigh. 
Generally, about 
30 days was the minimum period during summer, lengthen- 
ing to from 75 to 90 days as the usual winter minimum. 
In Toowoomba, the periods were greatly lengthened, except 
during January and February, when they approximated 
those ‘of Brisbane, remaining, however, 
(36-60 days)... 
42 
rather longer 
