( 264 ) 
In breeding places in the town larvae of Stegomyia scutellans and CuUx 
fa igans were found and in the neighbourhood pitcher plants of the same 
wo spec.es as were found near Pekan and these also contained larvae of 
h "? '"osquitoes. In the mangrove swamps which are more extensive 
There'klitd Rl -' er ^ er,aUtta ’ B «tleri and Stegomyia fusca were found, 
e is little malaria in the town or in the houses on either side of the 
nver bank but near the range of granite hills settlements have been made 
and have proved to be most unhealthy. These hills are thickly covered 
with forest and streams are numerous. In this jungle in every place 
Stegomyui scutellans were abundant and in certain spots M. Umbrosus was 
found in numbers. This mosquito was also found by Dr. Leicester 
outside the drained area at Klang but has not been met with in the interior. 
n the streams in this jungle Anopheles treacherii were found. Near one of the 
abandoned stations and within thirty yards of the sea Anopheles treacherii 
were found in the stream and also Cellia Kochii and A. sinensis in a pool. In 
bottles, empty tins and other artificial receptacles about the camp very 
obtTrbalT $ W6re d and th6Se inC ’ Ude Ste Z° m y ia Pilaris, Desvoidea 
and ?o Unn u tW f° nlght i? spent 0 , n the river then in flood at points some 20 
and 40 miles from the mouth only Mansonia annulipes, M. annulata and 
1 ceniovhynchus conopas were caught. 
Higher up at Sungei Lumbing a sufficiently long stay was made for a 
ald e thZ e h Stl f tl0n d THe river Whenthe subsided was quite dear 
and though a rapid running stream there were plenty of places where 
quiescent areas were to be met with but no grass growing into the stream 
10 anopheles larva; were found in the river and whilst living on the banks 
of the river no anopheles were seen in the house or other buildings. The 
river runs through a valley bounded on the south by a ranw e of so-called 
slate, Andalusite schist. The streams from this slate were not numerous 
and no anopheles were found in them whilst passing over the rocky bed 
Near the valley the streams passed through earth and formed pools, in some 
such places C. Kochn were found m large numbers. In most of the streams 
on this side no anophehna were found. On the other, the northern, side of 
were r ey d 1 6 b' 11 ® were granite and in the streams on this side A. treacherii 
abundantly y f ° Und ^ ° Wer d ° Wn the streams c - K ° chii were found 
On this, the granite, side anopheles were abundant. 
Malaria is rare amongst those working at the settlement of the Pahane 
oc°c r ur 0ra o O n n th W e th 15 A “n ^ °" the slate side ° f the "ver but doe! 
occur. On the other side, the granite side, i( is very common and often 
esneffiaM m0ng tK the ^°. odcutters who live near the foot of the hills more 
especially so in those living near the granite hills. 
c-w„7/ n the P °°! S ln , and 1 aroun d the township and various kongsis Stegomyia 
scutellans was the abundant mosquito but Culex fatigans was fairly common 
^ TTT 5 , md , ude C - C ■ ’nJetick C. vagansjC. situ 2 , 
^ c - hirsuttpalpis ! and C. concolor Uranotania trilineata and/,/sea. In 
Lr,vl a n ecep v acles SU ,? om y ta futellaris was again the commonest,' Stegomyia 
fasciata, Desvoidea aurohneata, obturbans and jugraensis were also found In 
