ANOPEJELINiE FOUND IN CEYLON. 
I 67 
found the larvae of the Anophelinse in the rivers, wewas, the 
pokunas, the kerneys, and the paddy fields, and at times in wells 
under conditions presently to be described. The greatest enemy 
of the larvae appears to be fish. The adults of many of the 
species can only be found with great difficulty, and some not at 
all, in the end of the dry season; while other species are most 
abundant and can be easily obtained. 
I now propose to discuss certain conditions in the life of the 
various species. 
(1) Myzomyia Rossii (Fig. 2). 
This species appears to occur all over Ceylon, and probably at all 
times of the year, but it is extremely noticeable in Jaffna and 
elsewhere that, when it is difficult to find other species of 
Anophelinse, it is easy to find Rossii, and the reason appears to be 
that it is not particular as to the kind of water in which it breeds. 
It seems always to be associated with human habitations. The 
adults show considerable variation in the wings, as pointed out by 
James (3). The number of males produced at one time is most 
remarkable. I found a large swarm of males at Batticaloa with 
but few females. 
The eggs can be easily found and easily recognized by the 
characters set forth by Stephens and Christophers (2), (4), and 
James (3). The larvae can be found in the wewas, kulams, 
pokunas, kerneys, pools, puddles, drippings by the side of wells 
in fresh and brackish water, and in paddy fields with water, if 
there are no prawns or fish, or if there is sufficient weed to pro¬ 
tect them. I have only once found the larvae in a running river, 
but never in deep dark wells, and I agree with Manders that, as a 
rule, Anopheles larvae prefer sunshine. I have noticed at times 
that on the shady side of a pool there will be few larvae, while on 
the sunny side there will be large quantities, but there are excep¬ 
tions to this. Their great enemies, as in the case of all larvae, 
are prawns and fish. 
The characters of the larvae are those set forth by Stephens and 
Christophers (2), (4), and by James (3), but the palmate hairs are 
not so constant as represented by them, for, while they are found 
on the second to the seventh segment inclusive, they may be well 
developed on the first or on one side of the first and not on the 
other side. 
The larvae differ in colour according to habitat, being dark in 
the paddy fields, green in green pools, and whitish in the white 
sandy pools of certain parte of Jaffna. This appears to me to be 
8(25)04 Z 
