SHEEP SCAB. 
27 
November 7, two seemed dead and the remainder alive; No- 
vember 9, a few were still active, no count made; November 11, 
all were dead. 
Lot 5 — Eighteen mites taken November 12. 
November 13, only fourteen were active; November 14, only 
four were active; not examined again. 
Lot 6 — Thirteen females taken November 13. 
November 19, all were dead and no eggs had been laid. 
Lot 7 — A large number (not counted) of mites taken Novem- 
ber 19. 
November 27, one very sluggish mite was all that showed 
any signs of life; November 28, all were dead. 
Lot 8 — A large number of mites taken November 27. 
Not examined till December 2, when all were dead. 
The longest time that a mite lived in any of the above ex- 
periments was eight days. As a rule, all were dead at the end 
of five days. 
EXPERIMENTS IN WHICH MITES WERE KEPT OUT OF DOORS. 
In these experiments, mites were exposed for a greater or 
less time on wool, in vials, out of doors, then they were brought 
in and warmed to see if they would become active. If the mites 
were still alive they always became active in a very few min- 
utes when the vials were warmed in the hand or with the 
breath. 
Lot 1 — A quantity of mites taken and put out November 3. 
November 5 and G, all seemed lively on warming; on the 
6th, 7th and 8th, a few of the mites failed to revive, but no 
counts were made; on the 9th, only four seemed alive; on the 
10th, only three, and on the 12th, two; on the 14th, two, and on 
the 17th, none. So that two mites in this case lived at least 
eleven days. Minimum temperature during the time was 13 
degrees. 
Lot 2 — A good number of mites put out along with the 
preceding. 
Examined for first time November 23, when all the mites 
became active on being warmed. Minimum temperature during 
the time, 13 degrees. 
Lot 3 — A quantity of mites put out November 19. 
Examined for the first time November 28, when all were 
found to be dead. Minimum temperature while out, — 11.3 de- 
grees. 
Lot 4 — A large number of mites put out November 27. 
Examined November 28, when all were dead. Minimum tem- 
perature during the night, — 9.8 degrees. 
