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ADDENDUM I. 
Description of Tivo Species of Anopheles frojii West Africa. 
By Major G. M. Giles, M.B., F.R.C.S., I.M.S. 
Owing to the sudden departure of Mr. Austen, late of the Liverpool Mahu-ia Expedition, for the 
seat of war, I have been asked to draw up a formal description of the two species of Anopheles brought by 
the party from the West Coast of Africa. I should however mention that, having run over the specimens 
with Mr. Austen, I am indebted to him for manj- of the points specified, so that the description might 
almost be said to be a joint production. 
We are agreed in considering one of the two species as undoubted!}- identical with Anopheles costnlis, 
Loew, originally described by him from Caffraria, but which now appears to have a wide distribution 
over, at any rate, a large proportion of the tropical and subtropical African littoral. The other species does 
not appear to have been previously described, and, at Mr. Austen's suggestion, has been named Anopheles 
fiinestus sp. n. 
The following arc the descriptions of the two species in question : — 
Anopheles COStalis, Loew. — Wings with the costa interrupted by patches of darker and 
lighter colouration, but not generally dark ; the costa has the basal third dark uith two minute interrup- 
tions followed b}- three other dark spots, the first of which is the largest, separated by smaller j cllowish 
interruptions ; portions of the other veins are black-scaled, but the lighter tinted scales preponderate. 
Abdomen not distinctly banded, but with the hind border of the segments rather darker, especially in the 
male. Tarsi with minute rings, mainly apical, but involving also the base of the next joint. 
Description from Loew, Berlin Ent. Zeits, 1866,/. 55. 
" ? Pale tinted, with the palpi black with white rings ; wings uith uniformly black costal spots. 
Length of the bod) , 2 lines ; of the wings, 27,2 — z'/j, lines. 
Clay coloured. The two first joints of the antenna: yello^v ; remaining joints brownish. Palpi 
black, with a white ring on each of their joints. Thorax with a bright brownish longitudinal stripe on 
either side, and a distinct brownish line in the middle. Pleuraj striped and speckled with pale brown. 
The hairs on the thorax, scutellem, and abdomen entirely light }'ellowish. Legs yellowish brown ; the 
femora yellowish at the base ; all the outermost points of the knees and tibias of a }'ellowish colouration. 
Wings limpid, with pale yellowish, almost white-haired veins, with here and there patches of black hairs, 
so as to produce a characteristic marking of the wing ; of these spots the most striking are four placed on 
the anterior border of the wing and not extending beyond the first longitudinal vein, and forming 
elongated black spots which alternate with clearer portions of the wing-border ; the spots on the remaining 
part of the wing are not so distinct, because, owing to the veins being placed further apart, they nowhere 
approach each other sufficiently close to admit of their black portions combining to form a noticeable 
spot. Habitat — Caffraria, South Africa." 
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