198 MOSQUITOES OP NORTH AMERICA 



MeBonotum clothed with narrow, curved bronzy-brown scales ; a pair of bare sub- 

 dorsal stripes, rather narrow and close together; setae abundant, long, coarse, 

 arranged in broad subdorsal and marginal rows, longest posteriorly. Scutellum 

 trilobate, clothed with bronzy-brown scales, each lobe with a group of coarse 

 black setae. Postnotum rather narrow, convex, dark brown, smooth, with a 

 group of small setae towards the hind margin. Pleurae and coxae luteous brown 

 with a vertical patch of bronzy-brown scales on the mesopleura and rows of 

 rather coarse dark bristles. 



Abdomen subcylindrical, compressed, truncate at apex, the cerei moderate, 

 subcorneal, with many fine hairs; first segment with numerous brown hairs 

 dorsally; last segment of abdomen finely hairy on lower surface posteriorly; 

 vestiture above of dull-brown scales with bronzy and blue luster, beneath dull 

 yellowish, submetallic; setae numerous, those on hind margin of segments 

 coarser. 



Wings rather broad, hyaline ; petiole of second marginal cell about one-third 

 as long as its cell; that of second posterior cell shorter than its cell; basal cross- 

 vein distant rather more than its own length from anterior cross-vein ; scales of 

 veins narrowly ovate to ligulate, a few with subtruncate apices, densest and 

 longest on forks of second vein; bronzy brown, with blue reflection along the 

 costa. Halteres pale with black knobs. 



Legs long and slender, the middle femora stouter than the others ; vestiture 

 of bronzy-brown scales, with a blue reflection in some lights ; femora duU yel- 

 lowish beneath. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4.5 mm. ; wing 4 mm. 



Male. — Proboscis moderately long and slender, with a suture beyond the 

 middle. Antennae very long, exceeding the body in length ; second joint about 

 sixteen times as long as wide, third joint about twelve times as long as wide, the 

 succeeding ones progressively shorter, the penultimate one about five times as 

 long as wide, the last joint thickened slightly, about as long as the penultimate. 

 Hairs of whorls sparse, shorter than in the female, somewhat obscured by the 

 coarse ciliation. Palpi very short, about one-sixth as long as proboscis. Colora- 

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

 longer, basal cross-vein about twice its length from the anterior. Abdomen 

 subcylindrical, somewhat enlarged apically, the setae coarser than in the female, 

 particularly apically. Claws on the front and middle legs rather large and sub- 

 equal, the outer one with a tooth at base along inner side; formula, 1.0-1.0-0.0. 



Length : Body about 4.5 mm. ; wing 4 mm. 



Genitalia (plate 8, fig. 53) : Side-pieces over twice as long as wide, stout, a 

 rounded conical apical lobe on inner angle bearing fine setae, a notch at middle 

 of inner margin bearing two short, very stout teeth and a slender spine within a 

 rounded prominence. Clasp segment small, stout, and chitinized like the side- 

 pieces, constricted near base, swollen apically and bearing one stout and one 

 small terminal claw within an apical notch, outer aspect densely clothed with fine 

 hairs. Harpes broad, rounded, apical margin clothed with a row of about 

 twenty-three stout, fine even teeth. Harpagones divided into three portions, the 

 middle one with a row of long teeth, inner one with the tips pointed and curved 

 inward, not as long as the harpes ; outer portion very long, broad at base, tip 

 spatulate, reaching beyond the lateral teeth of the side-piece, smooth. Unci 

 forming a broad truncate cone. 



Larva, Stage IV (plate 95, fig. 309). — Head rounded, beneath an angular, 

 laterally projecting lobe to cover basal process of mandibles ; antennse rather 

 long and slender, uniform, a tuft near middle ; upper head-hair in twos, lower 

 single, long. Lateral abdominal hairs in fours on first segment, then in twos to 

 fifth segment, single on sixth ; lateral comb of eighth segment of many spines in 



