5 a.m. they fed fiercely, 15 or 20 insects attacked one at the same moment, .1 
were able to feed successfully through clothing. 
At Coquilhatville, early in the evening, these mosquitoes were seen Hying tut 
the houses of Europeans where ordinarily none could be found during the da. 
time. The parasites of malaria were seen to develope in this mosquito at Homa 
In some of the mosquito breeding pools at Leopoldville the larvae 
of P. cost alls were completely destroyed by larger, cannibalistic Cities 
larvae. 
At Leopoldville in December, 1903, and in July, 1905, as well as at 
Ponthierville in October, 1904, it was observed that Culicida, were 
not breeding in the water of puddles and small streams containing an 
amorphous, brownish, apparently vegetable deposit, although ->imil.u 
neighbouring collections of water contained many larvae 
Pyretophorus marshallii, Theobald 
Six specimens, all females, were captured in the localities 
mentioned below. They were in all cases associated with P costa/is. 
but may readily be distinguished from the latter by the characteristic 
banding of the palpi. It is important to note, however, that among 
the long series of P. coslalis there are many intervening forms 
between typical examples of the two species. 
Localities: — Boma; Leopoldville (May); Coquilhatville. 
Yambinga. 
Circumstances of capture: The specimens were taken in the 
huts and mosquito nets of natives. 
Myzomyia funesta, Giles 
Localities: Zambie; Prince’s Island; Matadi; Wat hen ; 
Kalombe; Lusambo. 
Circumstances of capture :-—Examples of this mosquito were 
taken in the houses of both Europeans and Africans as well as in the 
mosquito nets of native servants. It is curious to note that not a 
single specimen of this mosquito was seen at Leopoldville where .1 
careful mosquito survey was made. 
Breeding places: Examples of this species were obtained from 
larvae developed in the laboratory. It is probable that in the I- 1 ' 
Congo it breeds amongst aquatic grasses along the banks of roer-, 
and in pools used for steeping manioc. 
♦ Possibly a species of Crcnothrix 011 whose gelatinous sheath iron bcO'im - 
deposited as ferric oxide. 
