( 2 &3 ) 
! 
I 
were the commonest larvae found in the open country whilst Culex fatigans 
was common nearer the more crowded portions of the town. 
On the open flat land in the vicinity of the river pitcher plants were 
extremely common. The two species have been identified by Mr. Ridley, 
the Straits Government Botanist, as Nepenthes Rafflesiana and N . gracilis. 
In both larvae were found in great abundance. These include a Teromyia 
T. Atev which like the larvae of other members of the genus was 
larvivorous. The other larvae found include a new species of Colonemyia and 
a Skeiromyia fusca. These appear to be carnivorous and to live on the bodies 
of the dead adult insects so abundantly found in these cups. These 
mosquitoes though of considerable interest are probably of little importance 
to man and do not in the adult stage attack him. 
At Pekan itself there is comparatively little malaria though it does 
occur. An examination of 138 native children^ was. made and only 7 
had spleens definitely projecting below the ribs. Of children over 6 mont s 
but under 4 years out of 69 in 5 the edge was below that of the ribs but 
only in 3 more than a finger’s breadth. Of 59 over 4 but under 10 in 
2 only was the spleen definitely enlarged. In 4 others spleen could just 
be felt. 
Along an African river, Zambesi or Shire, the proportion between 2 
and 4 years of age with definitely enlarged spleen is about 50 per cent. 
At the mouth of the river, Kuala Pahang, there are patches of 
mangrove and Nipah swamps though the greater part of the shore and the 
banks of the river are clear sand. 1 here are also cocoanut plantations 
and ample cocoanuts shells abound. hew mosquitoes were found in the 
house at the point. Those found were Stegomyia Scutellaris and Mansonia 
uniformis and‘ no anopheles. In the empty cocoanut shells and other 
receptacles larvae were not as frequently met with as is usual in such places. 
The larvae found were those of Culex maculicvura, C. graminis and Stegomyia 
Scutellaris. 
In the crab holes no larvae and no mosquitoes were found. On 
entering the mangrove swamp abundant mosquitoes were found. These 
bite viciously in the day time but remain in shelter and neither enter the 
houses nor come out into the open. Verralina Butleri and Stegomyia fusca 
were the species represented. 
The Kuantan River opens into the sea some twenty miles north of the 
Pahang River. It opens into a bay formed by a promontory of granite 
jutting out into the sea and a range of granite hills runs nearly parallel to 
the general direction of the river to the north having a belt of flat sand); 
soil from one to two miles in breadth between it and the river. Observa¬ 
tions were made on each side of the mouth of the river, in the town Kuala 
Kuantan, and at various places on the range of hills mentioned. 
There was excessive rain during the period under review' and conse¬ 
quently the flat land was so flooded that little information could be gained 
as to the more permanent breeding places. 
The mosquitoes found in the houses w r ere Stegomyia scutellaris , Alansonia 
uniformis and annulipes and Culex fatigans. No anopheles were seen and no 
Stegomyia fasciata. 
* 
