remained untreated as a « control ». The detailed records of these 
experiments may be seen in the first of the three reports already 
mentioned, and the result is that these dressings are useless for 
the prevention of egg-laying. Whether the washes were applied to 
back, legs, or all over made practically no difference. The age of 
the Cattle, however, is an important factor, for our results show 
that Yearlings are more subject to attack than Calves, and Calves 
than Cows. Instead of repeating here the detailed figures already 
published, a summary of the three years’ work is given in the 
appended table, which shows clearly the general conclusions 
reached. 
GENERAL RESULTS OF WARBLE-FLY EXPERIMENTS DURING 
THREE YEARS 1904-1905, 1905-1906, 1906-1907. 


Dressed. Untreated, 
= | E a noes 2 E © dI 
DS By Coa a 55 SI LS 
Ss ae ALS 28 22 Saas 
SES Es SESA Es Es 5852 
Pa oF ae ae 
dol ese ea e RR: 
Calves 67 677 10 24 259 12 
MAS EN 28 680 24.3 II 304 27.6 
COWS La piatta 8 70 8.7 33 110 3.3 
From this table it will be seen that the application of dressings 
had practically no effect in preventing the Flies from laying their 
eggs on the Cattle. Accordingly no dressings were applied after 
the summer of 1906, but in the spring of 1907 and subsequent years 
all the warble-maggots detected on the Department's farm were 
squeezed out from the Animals’ backs and destroyed. This led to a 
very marked reduction in the number of maggots in the succeeding 
year. In 1907, 2,090 maggots had been found in 194 Cattle, an 
average of nearly 11 per beast, while in the spring of 1908, 
132 Cattle harboured only 586 maggots, an average of 4.4 per beast. 
The reduction in that and the two subsequent years would have 
been much greater, had it been possible to destroy also the 
