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i 
[ 7 ] 
The most important differences were to be observed in tne portions o 
he coast near Port Swettenham where the land is low and swampy an 
:overed with mangrove. . , . , , 
In Port Swettenham itself, Stegomyia fasnata, the mosquito which has 
>een shown to carry yellow fever, was found in the houses and breeding in 
This mosquito occurs at Singapore, but was not found at the other 
daces examined on the coast, nor does it occur inland. It is probably an 
ntroduced species as it is easily carried m ships either in the adult mini as 
a tvs? or as e (,ror s. 
The distribution of the mosquitoes along this part of the coast was 
specially investigated by Dr. Leicester, who reports as follows:— 
Repout of an Investigation of the Mosquitoes of Port 
Swettenham, Klang and Jugra. 
By G. F. Lite ester , M.B ., C.M., Edin. 
The investigation was spread over a period of 24 days from 21st 
December, 1903, to 15th January, iqoq.^ 
P vt Swettenham. — This town is built on land which was former y a 
man Move swamp all of which at one time was under tidal influence. An 
area~of rather over 100 acres has, however, been entirely reclaimed and is 
now protected by bunds from such influence. Part ot the town is still 
without the bunded area and therefore still liable to flooding during t e 
highest tides. This is an important fact, as all pools m tne mangio\e 
swamps surrounding the town are at least once a fortnight flooded wit 
saline water. A sample taken from one of these pools about 150 yards 
from the mouth of the creek up which the water supplying them flows had 
a salinity of 1.618 grams per litre. 
On the south-east is felled mangrove swamp extending tiom the ound 
to the Sungei Aur, a tributary of the Langat River, with large pools fed by 
small creeks into which the river flows at high tide. In the north-west is 
mangrove swamp stretching down to the Klang River, and on the sout - 
west the town is bounded by the Langat River. Running right through 
the bunded area is the Kwala Klang Road, which acts as a sort of dividing 
line for the whole, being the highest point within it, and from either side ol 
this road the rain w’ater in part drains off to the outlets in the bunds, and it 
is here that during heavy rainfalls water is found lying in sufficient quanti v 
for mosquitoes to breed in. There is also considerable retention 01 water 
in the dotted area marked “ A ” in the map. . 
The soil consists of soft mud charged with organic matter lying upon 
a bluish clay. • •. T 
Rain fell on the last two days. But little fell during my visit. Lnder 
half an inch fell on the first two days. 
The following mosquitoes were caught :— 
(m) In houses: — 
Culicina. 
Culex fatigans 
Stegomyia fasciata 
Do. scutellaris ... * 
A iiophelina. 
Myzomvia Rossii 
Numerous. 
Scarce. 
do. 
Numerous. 
