396 MOSQIHTOES OF NORTH AMERICA 



The following is an abstract of the table : 



1. Antennse with the tuft from a notch beyond the middle 2 



2. Air tube not over four times as long as wide, stout at base and taper- 



ing, slightly curved forward with two stout hooks at tip 4 



4. Bars of comb in a straight row; body glabrous 5 



5. Comb of sixteen bars caudelli 



Desckjption or Femaim, Male, and Labva op Cui-ex catjdklo: 



Female. — Proboscis rather long, slender, swollen at tip and clothed with deep 

 brown scales. Palpi short, about one-fifth the length of the proboscis, rather 

 stout, covered with coarse brown scales. Antennae long and slender, joints 

 subequal, rugose, coarsely pilose, black; tori subspherical, with a cup-shaped 

 apical excavation, pale brownish, darker within; whorls consisting of sparse 

 moderately long hairs, cilia coarse and long; second segment slightly longer 

 than succeeding one. Clypeus prominent, shining deep brown. Occiput clothed 

 with black, broad recumbent scales with a bronzy or leaden luster and with 

 scattered brown, erect, forked scales, margins of eyes narrowly dull-white 

 sealed, cheeks silvery white. 



Prothoracic lobes elliptical, remote dorsally, clothed with pale scales and 

 black bristles. Mesonotum deep brown, clothed with narrow, curved bronzy- 

 brown scales; setae rather sparse, coarse and black. Scutellum with patches of 

 brown scales, the median lobe very large and prominent, each lobe witii a group 

 of black bristles. Postnotum olive brown, with a small median carina, nude. 

 Pleurae and coxae green, with flat whitish scales and rows of dark setae. 



Abdomen subcylindrical, depressed, truncate apically; dorsal vestiture of 

 bronzy-brown scales, in some lights nearly black with bluish iridescence, the 

 segments with basal triangular silvery-white spots at the sides; venter bromy 

 brown scaled on apical halves of segments, basal halves white ; tip of abdomen 

 with coarse bristles ; cilia on hind margins of segments coarse but sparse. 



Wings rather broad, vestiture of bronzy-brown scales, with a bluish reflection 

 on eosta, those on forks of second and fourth veins and outer portion of third 

 dense, ovate, also on first vein ; petiole of second marginal cell about one-fifth 

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

 vein more than its own length from anterior cross-vein. 



Legs shining bronzy brown, black in some lights; under surface of femora 

 pale. Claw formula, 0.0-0.0-0.0. 



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



Male. — Proboscis moderately long, rather slender, swollen at tip, clothed with 

 bronzy-brown scales. Palpi slender, very long; exceeding the proboscis by 

 nearly the length of the last two joints, which with tip of long joint are slightly 

 swollen and clothed with long black hairs ; vestiture bronzy brown. Antennae 

 densely plumose, hairs of whorls very long. Abdomen long and slender, pos- 

 terior portion depressed and moderately broad; vestiture above bronzy brown, 

 bases of segments with rather broad basal bands of silvery-white scales ; seventh 

 segment without basal band but with lateral silver white spots occupying about 

 half of basal portion of margin ; ventral surface bronzy brown with pale basal 

 bands; lateral cilia dark, moderately coarse and long. Coloration otherwise 

 similar to the female. Wings narrower than in the female, the stems of the 

 fork-cells longer, scales of veins sparser. Claw formula, 1.0-1.0-0.0. 



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



Genitalia ( plate 11, fig. 74) : Side-pieces over twice as long as wide, tips con- 

 ically tapered, projection extending from before middle to near tip, divided into 

 three portions, outer bearing three rods, a leaf-like appendage and a seta, others 

 bearing each a long filament with tapered recurved tip. Clasp-filament stout, 

 slightly enlarged at base, tip expanded into the shape of a foot, setose on outer 



