GENUS ANOPHELES 319 



however, are much shorter than the length of black separating 

 them : the two outer of these involve an equal length of I, but 

 the innermost is nearly twice as long as the costal portion of the 

 spot, being as long as the black interval in front of it, instead 

 of being but half its length as in the costal portion of the spot in 

 front of it ; there is an additional yellow dot midway between the 

 innermost distinct spot and the base of the wing, but it does not 

 involve the absolute margin of the costa, which is black. Saving 

 small patches on the^ three bifurcations, the rest of the wing is 

 mainly black, but the entire tip of the wing fringe and spots 

 opposite all the longitudinal junctions, but that of VI, are yellow. 

 Tarsi entirely black. Thorax and abdomen jetty black with 

 scattered golden hairs. 



Head black with distinct snowy frontal tuft, the fork-scales of vertex 

 and occiput all white ; palpi, J , as long as proboscis, sooty with a longish 

 white tip, and two snowy bands, the outer of which is much the broader ; 

 the <? has merely ii-regular grey patches on the club. Antennae, ? , black, 

 with silvery verticils and some white scales on some of the basal joints. 

 In certain lights there are some indications of four bare lines on the 

 curious powdery bloom so common on the thorax of Mosquitoes of this 

 genus. Halteres with yellow stems and black tips. The male has the 

 apices of the abdominal segments darker, owing to much powdery bloom 

 on their basal portions. Length. — 2*5 to 3 mm. 



Habitat. — ^mxyiSi, Leone, Mashonaland, British Central Africa up 

 to 5,600 ft. above the sea. Lake Chilwa, B.C.A., Zomba. 



" Observations. — This is a small, rather dark species, clearly related 

 to A. Rhodesiensis and A. sujjerpictus, but it can readily be told by the 

 position of the cross-veins ; the fringe is also spotted, and thus can at 

 once be told from A. Rhodesiensis. 



"Major Giles, who describes this species from Sierra Leona, says he 

 tarsi are not banded ; but, even in those that look unhanded to the 

 naked eye, traces of banding may be found on the apices of the tarsi, 

 whilst the Mashonaland specimens show the apical banding much more 

 distinctly. 



" Dr. Daniels says (Mai. Rep. R. S. E., 2nd Se. p. 34) that A. funestus 

 is the most numerous, the most widely distributed and the most per- 

 sistent frequenter of houses. In one district, and that the most mal- 

 arious, it is the only Anopheles found, and is more numerous than 

 any of the Culices there present." (Monog. p. 180.) This species has 

 been proved to be a vehicle of human malaria. 



32. ANOPHELES LISTONI, sp. n. 



Plate X, fig. 4a, Wing of $ ; 4b, head and appendages of 5 ; 4c, Wing 

 of (J ; 4d, head and appendages of <y . 



Wing with the costa black including the actual base, with four 

 yellow spots, distinct but much smaller than the intervening 



