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larvœ are characterised by possessing a pair of well developed palmate hairs
on all the abdominal segments and on the thorax.

       In habits this group is chiefly characterised by the fact that they breed
almost exclusively in running water. They may in fact be called the " stream
breeding mosquitoes." They are further characterised by the very important
fact that their members appear to be the chief malaria-carrying species in India
and Africa.

I. A. Fluviatilis, sp. n.

Synonyms—A. Christophersi (Theobald), A. Listoni (Liston), Fig. 9.

[NLS note: a graphic appears here - see image of 75022508.tif]

Fig. 9.—Wing of A. Fluviatilis.

       This mosquito has been re-named A. Christophersi (though not as yet
described) by Mr. Theobald. It has also been accurately described by Cap-
tain Glen-Liston, I.M.S., in the Indian Medical Gazette (Oct. 1901) under
the name A. Listoni. The description of A. Listonii (Giles) in Colonel Giles'
Hand-book of Mosquitoes* does not, I think, apply to this species, and his des-
cription is possibly from a specimen of A. Culicifacies.

       It is a small mosquito of a generally brown colour. The palpi are marked
with three white bands—one broad band which includes the tips of the palps
and two narrow bands nearer the base.

       The legs are unbanded.

       The wing markings are detailed in the diagram, and it is therefore not
necessary to enumerate the number of black and white spots on each vein here.
The following points should be specially noted: (1) The third longitudinal vein
is white scaled nearly throughout its length. (2) Including the white apical
spot there are six white patches on the wing fringe opposite the terminations of
the longitudinal veins, except the sixth.

       The wing markings in this species may, however, vary a good deal, and it
may even be possible to find specimens in which the third longitudinal vein is
black scaled almost throughout, thus making it difficult to distinguish this
species from A. Culicifacies.

    * A Hand-book of the Gnats or Mosquitoes, 2nd edition, 1902. John Bale Sons and Danielsson.