REPORT ON MOSQUITOES. 223 



Description of the Adult. 



This is a large blackish brown mosquito, very robust in appear- 

 ance. The body is 6 to 7 mm. ,=.24 to .28 of an inch in length, 

 exclusive of the beak and the wings expand about 14 mm., or 

 almost three-fifths of an inch ; the beak is not quite half the length 

 of the body. The head is whitish in the posterior part, with 

 patches of brown or blackish scales on each side of the center; 

 the beak is black with a few scattered pale scales on the central 

 and basal portions; the palpi in the female are slender, black in 

 color, tipped with white, the terminal joint a small round knob 

 with short spiny hairs. In the male they are brown or blackish, 

 the basal joint white near the head, and with a yellow band in 

 the center ; the fan-like tufts are brown with yellow hairs at the 

 base of the second joint and at the apex of the third joint. The 

 antenna of the female is dark brown, while that of the male is 

 paler brown with yellow reflections. 



The thorax is grayish white with a dark brown median band, 

 which is excavated in the anterior portion and sprinkled with a 

 few golden brown scales. The other brown marks are on the 

 sides of the band, posteriorly separated from it by narrow gray- 

 ish stripes. This band is sometimes light brown anteriorly and 

 mixed with the gray, giving the thorax a mottled appearance. 

 The pleura are brown with patches of whitish gray scales. The 

 femora have mixed black and yellow scales on the upper surface, 

 fewer on the posterior side and are not collected into spots nor 

 bands ; their apices are yellow and beneath they are almost 

 wholly 3''ellow. The tibire are black except for a slight sprink- 

 ling of yellow scales, the posterior ones yellow at the knee. The 

 tarsi are black with well defined white bands at the base of each 

 joint in the hind feet and narrower bands on the first four joints 

 of the mid and fore feet. The claws are one toothed on all feet 

 of both sexes. Those of the anterior tarsal joint (fig. 65, 4) in 

 the male, are stout, one about three-fourths the length of the 

 other, the shorter one with the tooth nearer the base. The claws 

 of the mid tarsal joint (fig. 65, 5) are, one short with the tooth 

 at the middle and one very long, sharply curved at the basal 

 third and the tooth situated in the inner angle. The hind pair of 

 claws (fig. 65, 6) and also all those of the female are of equal 

 length, with the median tooth slightly nearer the base. The 

 wings are hyaline, the veins densely covered with broad, mixed 

 black and white scales, and with many long narrow ones on the 

 apical third of the wing. 



The abdomen is black above with a few whitish scales inter- 

 mixed; segments one to six are broadly banded with yellowish 



