312 
Oriental Sore 
and was dissected twenty-four hours after the last, while fig. 37 is 
from one that was fed on ten successive days and dissected forty-eight 
hours after the last feed, and fig. 40 from one that had two feeds and 
was dissected twenty-four hours after. There is nothing of special 
interest to note about these forms except their resemblance to the 
cultural forms met with in the test tube cultures. 
I. Attempts to transmit the sore hy the bites of Stegomyia fasciata. 
Owing to the fact that the parasite of the sore develops in the 
Stegomyia fasciata and that this mosquito is so constantly attacking 
man, it was regarded as a very probable transmitter of the disease. 
Accordingly a series of experimeiits were undertaken in order to test 
this point. Specimens of Stegomyia fasciata were allowed to feed on 
the sore for a varying number of days and in each case after a lapse of 
twenty-four or forty-eight hours after the last feed from the sore the 
mosquitoes were allowed to feed on a small area about the size of a 
shilling on my forearm. In this way were fed twenty-six mosquitoes. 
Six of these had fed from the sore on ten successive days, and forty-eight 
hours later on my arm, fourteen had fed from the sore on four successive 
days and on my arm after an interval of twenty-four hours, two had fed 
from the sore on five successive days, and after twenty-four hours on 
myself; three had six successive feeds from the sore and a feed on my 
arm after an interval of forty-eight hours; one had fed once from the 
sore and after forty-eight hours on myself 
The following table gives the details of these feeding experiments: 
Number of Stegomyia 
Number of days on 
which Stegomyia had 
fed on the sore 
Interval elapsed between 
last feed from sore and 
feed on myself 
6 
10 
2 days 
14 
4 
1 day 
2 
5 
1 day 
3 
6 
2 days 
1 
1 
2 days 
All these mosquitoes were examined twenty-four hours after they 
had fed from my arm. In two of those that had fed from the sore four 
times, and in one that had fed five times, were flagellates found. The 
rest gave negative results. Nearly nine months have elapsed since this 
experiment was made, and there is still no sign of a sore developing at 
the spot where these mosquitoes fed. All of them fed from the same 
small area of skin. I was exposed to infection all the time I was in 
