157 
Genus Anopheles. 
are dark scaled, with a few creamy spots ; in Ttossii they are 
yellow scaled, with a few minute black spots. In superpictus 
the apical fringe is black, and there are only three small pale 
areas to the fringe; in Rossii it is yellow, and there are four 
pale fringe spots. It differs from A. costalis by the wing not 
being dusky at the base. Variation in this species, of which I 
have examined a large number, is very slight. In some the 
costa is black at the root of the wing, in others broken by two 
small yellow spots. It also varies in general colour, some being 
much darker than others, and the wings become white, apparently 
with age, but the T-shaped costal spot is always very distinct. 
Major Ross calls this mosquito the Large Dapple-Wing. It was 
first described by Colonel Giles, in the ‘Journal of Tropical 
Medicine’ (October 16, 1899, p. 62), and since in his work on 
Oulicidae. Dr. Daniels states that it is common in stables in 
Calcutta, and that it does not carry tertian and crescent stages 
of the malarial parasite. 
Captain James has shown that in this species, with other 
Anopheles, the metamorphosis of Filaria sanguinis-hominis takes 
place ( Lancet , August 11, 1900, p. 451). 
It seems to be commonly distributed over India and the Malay 
Peninsula, and probably over the greater part of Southern China. 
Although closely related to Grassi’s A. superpictus , it is clearly 
specifically distinct, because of—- 
(i) the different positions of the cross-veins; 
(ii) the T-shaped costal spot; 
(iii) the presence of pale areas on the fringe; and 
(iv) its more fawn-coloured hue. 
(v) the different structure of the larva. 
15. Anopheles costalis. Loew. 
(Ent. Zoit. Beilin, p. 55 (18G6).) 
(Fig. 15, ri. IV.) 
Thorax dull brown, with yellowish hair-like scales, metanotum 
chestnut-brown. Abdomen almost black, with dense yellowish 
pubescence ; legs brown, femora and tibiae mottled with yellow, 
tarsal banding involving more or less both sides of the joints; 
wings with four large and two small black spots on the costa, 
the remainder yellow ; below the two large middle spots on the 
first long vein are two broken black spots, and under the other 
two, two entire black spots. 
