326 MOSQUITOES OF NORTH AMEKICA 



with a blue luster on costal edge, outstanding ones moderately dense, broadly 

 linear, those on forks of second and fourth veins much denser. 



Legs moderate, rather slender, femora whitish beneath nearly to tip; tibisB 

 and tarsi brown with a bluish reflection and pale-bronzy luster beneath ; knees 

 dark. Claw formula, 0.0-0.0-0.0. 



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



Mode. — Proboscis straight, rather stout, slightly and gradually enlarged to- 

 wards apex, bronzy-brown scaled. Palpi very slender, hardly enlarged apically, 

 exceeding the proboscis by more than the length of the last joint; tip of long 

 joint and last two joints sparsely clothed with moderate black hairs; vestiture 

 entirely of bronzy brown scales. Antennae with the last two joints long and 

 slender, rugose, pilose, black, the others short, but longer than uanal; hairs of 

 whorls long, blackish, dense, but appearing less plumose, as the shaft is rather 

 long and slender. Coloration simUar to the female. Wings slightly narrower 

 than in the female, the fork-ceUs about the same, vestiture also similar. Abdo- 

 men elongate, depressed; lateral spots very large and tending to form bands, 

 second, third, and last segments with dirty-whitish basal bands, that on last seg- 

 ment expanded laterally; hairs at ends of segments coarse, brown, tip wiQi 

 numerous coarse long bristles ; no lateral cUiation. Claw formula, 1.1-1.1-0.0. 



Length : Body about 3.5 mm. ; wing 3 mm. 



Genitalia (plate 13, fig. 89) : Side-pieces over twice as long as wide, tip nar- 

 rowly conically tapered; outer lobe divided into two portions, both stout and 

 narrowly quadrate at their tips, somewhat widely divaricate ; outer lobe with a 

 leaf -like appendage and a seta, inner lobe with three rods with hooked tips. 

 Clasp-filament long, attenuated in middle, a stout subapical inserted claw and 

 two minute setae below. Harpes divided, inner limb rounded and crowned with 

 dense, stout spines, outer limb long, blade-like, strongly curved. Harpagones 

 divided into a number of plates, a broad, rounded inner one obscuring basal por- 

 tions, apical ones projecting as long stout teeth. 



Larva, Stage IV (plate 96, fig. 312). — Head rounded, widest through eyes, 

 bulging at sides, a notch at insertion of antennae, front margin arcuate. An- 

 tennae large, basal two-thirds thick, spined; a large tuft at the outer third 

 from a notch ; two long setae subapically, a long seta, a short one and a digit at 

 tip. Head-hairs in fours, ante-antennal tufts multiple. Mental plate triangular, 

 oblique on sides, a large central tooth and ten on each side, basal ones a little 

 more remotely spaced, last one small. Mandible quadrangular; three filaments 

 and a tuft of hairs before tip ; an outer row of cilia from a collar ; a row of trans- 

 verse rounded prominences on outer margin each bearing a hair and a tuft of 

 short ones ; dentition of four teeth on a process, first longest ; a spine before, a 

 small tooth and a large trifid one at base, a long serrate filament and a row of 

 feathered hairs within; process below long, curved with a longitudinal and a 

 transverse row of hairs, a tuft at tip of each limb ; basal angle moderate with a 

 row of stout hairs within ; a short row of hairs at base. Maxilla elongate-conical, 

 divided by a suture ; inner half with a row of long hairs on margin, some of the 

 basal ones slightly feathered, two rows of cilia within ; a row of long hairs at tip 

 running down along the suture ; outer half with two filaments below the middle, 

 a spine on outer side and some irregular points on margin. Palpus small, 

 slender with four irregular apical digits. Thorax rounded, wider than long; 

 abdomen moderate, anterior segments shorter ; sMn shortly pilose ; lateral hairs 

 multiple on first abdominal segment, triple on second, in twos on third to sixth. 

 Air-tube gradually tapered, more strongly on outer half, nearly five times as 

 long as wide; pecten evenly spaced, running to basal third; single tootii broad 

 with from two to four basal branches ; three hair tufts on posterior margin, the 

 middle one out of line and beyond middle of tube. Lateral comb of eighth seg- 



