310 Records of the Indtan Museum. [Vors VIT; 
with Culex larve, the young Toxorhvnchites continued to prey upon 
each other until but a single survivor remained in each vessel. 
Having a habit of backing blindly about in the water, they sooner 
or later come within reach of the jaws of their companions.’’ 
As these remarks appear to be susceptible of an interpretation 
that was never intended by their author, I should like to take this 
opportunity of explaining them more fully. 
With regard to the earlier paragraph, until their carnivorous 
proclivities had been definitely proved, the newly-hatched larvee 
were crowded together in a single vessel, without those of any 
other species. They had therefore no choice but to devour each 
other—or starve. 
In the second paragraph, I thought that the concluding 
sentence sufficiently explained the disappearance of the 7oxorhyn- 
chites in spite of the presence of other Culex larve. 
My experience was certainly not that of Mr. Paiva, who found 
‘‘that the larva will devour that of any other species, if present, 
before attacking those of its own kind.’’ 
I do not, for a moment, suppose that Toxorhynchiies larvee 
prefer to feed upon members of their own species; but I am 
equally doubtful of their preference for those of other species. I 
am inclined to believe that it is a matter of complete indifference 
to them and that the choice of prey is guided simply by opportu- 
nity. Their jaws instinctively close upon any wriggling creature 
that comes within reach-—be it one of their own or an alien race. 
The more sluggish habit of the Toxorhynchites renders it a more easy 
prey, especially when combined with its habit of backing about 
on the surface of the water. 
The fact remains that, in any restricted collection of water— 
such as the cup of a broken bamboo stem, it is seldom that more 
than a single fully-developed Toxorhynchites larva can be found, 
amongst a crowd of other Culicid larvee. 
E. ERNEST GREEN. 
PERADENIYA, 15th May, 1912. 
CRUSTACEA. 
EAst ASIATIC SPECIES OF Apfus.—When writing my notes on 
this subject (Rec. Ind. Mus., vi, 1911, p. 357) I was unable to give 
any references to Apus granarius, Simon. Tor the following I am 
indebted to Dr. W. T. Calman :— 
Apus granarius, Simon, Ann, Soc. entom. France, ii, 1886, 
p. 446, and G. O. Sars, Ann. Mus. Zool. St. Petersburg, 
vi, I901, p. 133, pl. i, pl. 1, figs. r—12. 
