604 MOSQUITOES OF NORTH AMERICA 



stout, the joints subequal, rugose, pilose, black; second and third joints luteous, 

 the second longer than the others, the third shorter ; tori subspherical, with a 

 cup-shaped apical excavation, brown, with a group of narrow white scales on 

 inner side ; hairs of whorls very short, sparse, black. Clypeus elliptical, convex, 

 brownish, nude. Eyes black. Occiput narrow, convex, dark brown, clothed 

 with narrow, curved, silvery scales, which about half cover the surface, and 

 many narrow, erect, forked, black ones with bronzy luster; at the sides a small 

 patch of flat, broad black scales, followed on the cheeks by flat, broad white 

 scales; eyes bordered by a row of curved black bristles. 



Prothoracic lobes moderate, elliptical, remote dorsally, clothed with narrow 

 curved white scales and black bristles. Mesonotum deep brown, faintly darker 

 in a pair of rather broad submedian stripes and on the lateral areas, vestiture 

 of narrow, curved, silvery-white scales and golden-brown ones in ill-defined 

 patches medianly, on the lateral depressions and above the roots of the wings ; 

 bristles black, numerous at the roots of the wings. Scutellum trilobate, brown, 

 each lobe with a large patch of narrow curved silvery-white scales and about 

 eight black bristles. Postnotum elliptical, prominent, 4ark brown with a slight 

 whitish pruinosity, nude. Pleura; and coxae brown, clothed with narrow, 

 elliptical, flat, white scales and brownish bristles. 



Abdomen subcylindrical, flattened, tapering posteriorly, the cerci promi- 

 nently exserted; dorsal vestiture of dull black scales mixed with dark brown 

 ones, the apical thirds or more of segments with flat white scales which form 

 irregular bands, first segment with a small median patch of white scales and 

 densely hairy, sixth segment with an incomplete white band, seventh wholly 

 black ; venter clothed with whitish-golden scales, sides of seventh segment dark 

 brown scaled; setse short, black dorsally, golden ventrally; cerci black. 



Wings moderate, hyaline, iridescent; petiole of second marginal cell longer 

 than its cell, that of second posterior cell equal to its cell ; basal cross- vein rather 

 less than its own length distant from anterior cross- vein ; veins brown ; scales 

 black and white intermixed, the black ones predominating, the recumbent scales 

 ligulate and narrowly cuneiform, the outstanding ones very narrowly lanceolate, 

 smoky; fringe unicolorous, blackish. Halteres entirely pale. 



Legs moderate ; femora clothed with pale and yellow scales below towards base, 

 upper side and tips black with white intermixed, extreme base and apex yellow- 

 ish-white, a narrow white subapical ring; tibiae black with white scales inter- 

 mixed, not forming spots; tarsi black, with some whitish scales basaUy, each 

 joint with a white basal ring, broad on second and third joints of hind tarsi, 

 almost obsolete on fore and middle tarsi, the last two joints being entirely black. 

 Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Male. — Proboscis straight, uniform, with a broad, ill-defined pale ring from 

 basal third to near tip. Palpi exceeding the proboscis by nearly the length of 

 the last joint, last two joints subcylindrical, not enlarged ; vestiture black, with 

 white rings at bases of last two joints and before middle of long joint; end of 

 long joint and last two joints with long, dense, black and luteous hairs. An- 

 tennae plumose; last two joints long and pilose, the others short, black at in- 

 sertions of the hair-whorls, whitish beyond; hairs of whorls long and dense, 

 brown with golden luster. Coloration similar to the female. Wings narrower 

 than in the female, the stems of the fork-cells longer, the vestiture less 

 abundant. Abdomen elongate, with long, dense, pale, lateral ciliation; the 

 broad white apical segmental bands somewhat diffused especially posteriorly. 

 Claw formula, 1.0-1.0-0.0. 



Length : Body about 3 mm. ; wing 2.5 mm. 



