9
1st day.—Stomoxys and common house flies were observed on the un-
smeared camel from 9-30 A.M.. till evening : 23 Tabanidæ were counted on the
imsmeared camel during the day, and 2 Tabanidæ settled on the smeared camel,
but did not suck any blood A few Stomoxys and common house flies settled on
the smeared camel, but did not remain for any length of time.
2nd day —Tabanidæ were numerous on the unsmeared camel and on
the smeared camel a few Tabanidæ settled but flew away without biting.
Stomoxys and common house flies settled on the smeared camel but no Stomoxys
was observed to bite.
3rd day.—Stomoxys and common house flies were observed on the
control and several Tabanidæ attacked the control. On the smeared camel
common house flies and Stomoxys were numerous, but no Stomoxys was observ-
ed to suck. Several Tabanidæ settled on the smeared camel but none was seen
to suck.
4th day —Flies were not numerous ; they attacked the smeared and un-
smeared camel to the same extent.
Result.—Four pints of Castor oil prevented Tabanidæ and Stomoxys
from biting for 3 days. Stomoxys and Tabanidæ were observed to settle on
the smeared camel a few hours after the application of the oil : they, however,
did not bite.
Conclusions.—The result obtained with 4 pints was the very different
from that obtained with 3 pints, but I do not think that it is due to the extra pint
of oil used. At this time of year the quantity of hair on camels varies greatly.
The camel that was smeared with ; pints had practically no hair, whereas both
camels that were smeared with 4 pints had a fair quantity of hair. The
matting of the hair by the oil might explain why the Tabanidæ did not attack
those parts where there is hair, but it does not explain why the Tabanidæ did
not attack the camels smeared with 4 pints on the sheath, etc., where there is never
any hair on camels. In experiments with repellents for protecting animals from
the attacks of Tabanidæ and other biting flies the results obtained depend to a
great extent upon whether the flies are very hungry or not.
Castor oil is of no practical value on account of the co3t.
Smearing a
camel with 4 pints costs over Rs. 2-8-0.
BLACK QUARTER.
39. Are camels susceptible to black quarter — In order to determine
whether camels are susceptible to this disease 3 camels were inoculated with
black quarter virus, one young buffalo and one calf acting as controls.
Camel No. 1. Male one year old inoculated with 5 c.c. of emulsion
of black quarter muscle intramuscularly - died with typical symptoms of black
quarter 37½ hours after inoculation.
Camel No. 2.—female—one year old—inoculated with 5 c.c. of emulsion
of black quarter muscle intramuscularly—died with typical symptoms of black
quarter 38½ hours after inoculation.
Camel No. 3 —Male—seven years old—inoculated with 5 c.c. of
emulsion of black quarter muscle intramuscularly —died with typical symptoms
of black quarter 63 ½ hours after inoculation.
Control No. 1.—Buffalo—three months old—male—inoculated with 5
c.c. of emulsion of black quarter muscle intramuscularly -died 23½ hours after
inoculation.
Control No 2.—Calf—male—nine months old—inoculated with 5 c.c.
of emulsion of black quarter muscle intramuscularly —died 45½ hours after
inoculation.