Genus Toxorhynchites. 123 
Time of capture—April. 
Observations.—Described from a single ¢ caught by Mr. 
Marshall and named after him. ‘The fore legs are damaged and 
the mid entirely absent, otherwise the specimen is perfect. It is 
very near Walker’s Toworhynchites immisericors, but can be told by 
the different lateral pale spots; in this species they are long, forming 
almost a lateral line on the first few segments ; the white lateral 
patches to the first abdominal segment also readily separate it. 
The @ is unknown. Another specimen is in the Hope 
Collection, Oxford. It may be a Megarhinus, but it is not 
possible to say without seeing a ? .* } 
ToxXORHYNCHITES IMMISERICORS. Walker. 
- Megarhinus immisericors. Walker. 
Culex regius. Thwaites. 
Megarhinus Gilesti, 9. Theobald. 
Megarhinus subulifer. Dolleschall. 
(Mono. Culicid. I., p. 225, 1901 (immisericors), p. 227 (Gilesit) ; Proc. Roy. 
Soe., vol. lxix., p. 361; Nat. Tijdschr. v. Ned. Ind., vol. xiv., p. 382 
(subulvfer).) 
Synonymy.—As mentioned in my previous volume of plates 
(Pl. IX.), this is a true Toxorhynchites and not a Megarhinus. 1 
have seen a specimen from the East Indies of this species, and I 
feel sure that Dolleschall’s species, M. subulifer,{ is the same. My 
M. Gilesti, which I described from old, faded material, must also 
sink as a synonym, for it is no other than a Q immisericors. 
The species seems to be one of the commonest members of the 
genus, being found from Ceylon, over most parts of India, down 
the Malay Peninsula, and in the East Indian Islands. There is 
some considerable variation in the leg-banding and also in color. 
Additional localities —Burma ; Amboina. 
Mr. E. Ernest Green writes me from Ceylon that he has 
discovered the larva of immisericors and has bred it up from 
the egg. It is, he says, a most interesting creature, purely 
carnivorous. It lives in hollow stumps of the giant bamboo and 
preys solely upon the larvae of other mosquitoes. The eggs are 
laid singly. They are of a regular ovoid shape and float on their 
sides on the water, rupturing across the equator into two equal 
halves to liberate the young larvee. 
* A 9 has now been received from Uganda. Itis a true Toxorhynchites. 
t Nat. Tijd. v. Ned. Ind. xiv., p. 382. 
