442 MOSQUITOES OF NORTH AMEEICA 



Legs slender, long; vestiture black with a blue and bronzy reflection; hind 

 femora broadly white beneath nearly to tips, knees white ; tibiaB narrowly white 

 at base and apex; hind tarsi with narrow white rings at bases of all the joints; 

 fore and mid tarsi unhanded. Claw formula, 0.0-0.0-0.0. 



Length : Body about 2.5 mm. ; wing 3.5 mm. 



Male. — Proboscis straight, slightly enlarged toward apex. Palpi about as 

 long as the proboscis, slender, uniform, the tip blunt and with a few stout hairs; 

 vestiture bronzy black. Antennae plumose; last two jointe long and slender, 

 rugose, pilose, black, the others short, stout, whitish, with black rings at inser- 

 tions of hair-whorls; hairs long, dense, brown. Coloration sioular to the 

 female. Wings narrower than in the female, the stems of the fork-cells about 

 the same, vestiture somewhat more sparse. Abdomen elongate, slender, enlarged 

 near apex; dorsal white bands broad, expanded laterally on sixth and seventh 

 segments, eighth segment wholly white scaled; lateral eiUation moderate, rather 

 sparse, pale. Claw formula, 1.1-1.1-0.0. 



Length : Body about 2.5 mm. ; wing 2 mm. 



Genitalia (plate 9, fig. 58) : Side-pieces over twice as long as wide, conical; 

 a truncate prominence towards base bearing two stout rods with hooked tips and 

 surrounded by dense, fine setae. Clasp-filament stout, moderate, narrowed at 

 tip, bearing an articulated terminal claw. Harpes with a comb-shaped process 

 at end of a long rod, both harpes and harpagones plate-like, divided, revolute 

 and superposed. Unci slender, approximate. No basal appendages. 



Larva, Stage IV (plate 109, fig. 367). — Head rounded, widest through eyes, 

 a large noteh at insertion of antennae, front margin arcuate. Antennje long, 

 slightly curved, smooth, a moderate tuft from a noteh before apical third ; three 

 long setae, a short one and a digit at tip. Upper pair of dorsal head-hairs 

 multiple, lower pair single; ante-antennal tuft multiple, short. Mental plate 

 small, triangular, with a large prominent central tootii and nine on each side, 

 basal ones small and remote. Mandible triangular, base produced into a rounded 

 prominence ; three filaments before tip ; an outer row of cUia from a collar ; a row 

 of high conical prominences on outer margin, each bearing a tuft of long fine 

 hairs; dentition of a single tooth on a prominence with a row of thick spines 

 below; a spine before, a long smooth filament and five serrate hairs within; 

 process below sloping obliquely basally, widely but shortly furcate, with a 

 median row of hairs at tip of each limb ; basal angle small, with a row of hairs 

 within ; a row of hairs at base. MaxiUa elongate, rounded at tip, divided by a 

 suture; inner half with long spines along margin and two rows of cUia within, 

 a long spine at outer third; a row of long hairs at tip running down along 

 suture ; outer half with two small filaments next suture at lower tiiird. Palpus 

 rudimentary, with four long digits. Thorax rounded, wider than long. Abdo- 

 men moderate, anterior segments shorter; lateral hairs in threes on first seg- 

 ment, in twos on second to fifth, single on sixth ; tracheal tubes narrow, angled 

 in the segments ; skin glabrous. Air-tube very long, slightly widened at base, ten 

 times as long as wide; pecten of long simple spines not quite reaching basal 

 fourth; four short slight tufts on posterior margin beyond pecten. Lateral 

 comb of eighth segment of many spines in a triangular patch ; anterior spines 

 slender, pointed, posterior ones larger, thick and rounded, all smooth. Anal 

 segment twice as long as wide, ringed by the plate ; dorsal tuft of two long hairs 

 on each side; a small lateral hair; ventral brush moderate, confined to the 

 barred area. Anal gills long, nearly twice as long as the segment, evenly 

 tapered. 



The larvae live in the water between the leaves of Bromeliacete. Mr. Knab 

 found them in such situations whenever there was water in the plants. They 



