808 MOSQUITOES OF NORTH AMERICA 



blackish, nude. Byes bronzy-black. Occiput black, clothed broadly with narrow 

 curved scales on vertex, flat ones on the sides, pale golden yellow dorsally and 

 along eye-margins, a diffused black patch well down the sides, many pale yellow, 

 erect forked scales on the nape ; setae along margins of eyes black, those pro- 

 jecting between eyes pale yellow. 



Prothoracic lobes elliptical, remote dorsally, dark brown, eoncolorous with 

 sides of mesonotum, with j>ale scales and numerous black bristles. Mesonotum 

 dark brown, clothed with narrow, curved scales, dull golden, marked with dark 

 brown in a large lateral patch on anterior third and a small spot at posterior 

 third ; setae rather short, black. Scutellum trilobate, brown, clothed with narrow 

 curved dull golden scales, each lobe with a group of blackish bristles. Postnotum 

 elliptical, prominent, dark brown, nude. Pleurse brown, coxse luteous, clothed 

 with patches of elliptical white scales and rows of pale bristles. 



Abdomen subcylindrical, somewhat flattened, tapering posteriorly; dorsal 

 vestiture black with a slight metallic reflection, very narrow bands of sordid 

 white scales at bases of segments, obscure outwardly, a row of triangular lateral 

 basal segmental yellowish- white patches ; first segment black scaled, with many 

 fine pale yellow hairs ; venter yellowish-white sealed. Cerci black. 



Wings rather broad, hyaline; petioles of second marginal and second posterior 

 cells shorter than their cells and about equal ; basal cross-vein distant its own 

 length from anterior cross vein; scales brown, the outstanding ones narrowly 

 ligulate, those on forks of second vein dense and broader. Halteres whitish, with 

 blackish knobs. 



Legs slender, moderately long; vestiture dull bronzy brown with a bluish 

 luster ; femora beneath yellowish-white to near tips ; under sides of front and 

 mid tibiae and first tarsal joints narrowly white scaled. Claw formula, 

 1.1-1.1-1.1. 



Length : Body about 4 mm. ; wing 3.5 mm. 



Male. — Proboscis straight, long and rather slender; vestiture dark bronzy 

 brown. Palpi exceeding the proboscis by nearly the length of the last joint; 

 end of long joint and two last joints slightly swollen and with dense, long 

 brown hairs. Antennae plumose, the last two joints long and slender, rugose, 

 pilose, black, the others short, pale, narrowly ringed with black at insertions 

 of hair- whorls ; hairs long, dense and brown ; tori entirely blackish. Coloration 

 similar to the female, the scales on the mesonotum much paler, brassy. Abdomen 

 elongate, depressed; dorsal segmental white bands broad; lateral ciliation fine, 

 long and abundant, pale yellow. Wings narrower than in the female; stalks 

 of the fork-cells longer, the vestiture sparse. Claw formula, 2.1-3.1-1.1. 



Length : Body about 4.5 mm. ; wing 3.5 mm. 



Genitalia (plate 29, fig. 197) : Side-pieces three times as long as wide, small 

 at tip; apical lobe roundedly prominent, basal small, rounded, densely setose, 

 with a stout curved spine within. Clasp-filament slender, slightly swollen in 

 middle, with a long articulated terminal spine. Harpes narrowly elliptical, 

 concave, inner margin thickened and revolute, tip pointed and recurved. 

 Harpagones with a slender columnar minutely pilose stem, with a terminal 

 articulated filament, which is widened in middle and bears a retrose spine with 

 a small denticle below it. Unci contiguous, revolute, forming a moderate basal 

 cone. Basal appendages small, bearing two stout spines. 



Larva, Stage IV (plate 120, fig. 415). — Head rounded, widest through eyes, 

 narrowed anteriorly, front arcuate. Antennae moderate, slender, uniform, 

 minutely spinulated, a small tuft situated near middle. Both pairs of dorsal 

 head-hairs single, ante-antennal tufts in fives. Body with the skin smooth; 

 lateral abdominal hairs single after second segment. Lateral comb of eighth 



