924 MOSQUITOES OF NORTH AMEEICA 



silvery-white; front and mid tarsi with a brassy luster, particularly apically. 

 Claw formula, 0.0-0.0-0.0. 



Length : Body about 2 mm. ; wing 3.5 mm. 



Male. — Proboscis straight, long and enlarged towards apex. Palpi short, 

 almost hidden by the clypeus. Antennae plumose, rather long, the last two 

 joints long and slender, brown, with long dilation, the others much shorter, 

 with large basal whorl and small whorl medianly; hairs of basal whorls very 

 long, those of median ones short and sparser. Coloration as in the female. 

 Abdomen more elongate than in the female; ciliation coarse, rather sparse, 

 irregular, yellowish. Wings hardly narrower than in the female; venation 

 about the same; scales along the veins larger and paler. Claw formula, 0.0- 

 0-0.0. 



Length : Body about 1.6 mm. ; wing 1.8 mm. 



Genitalia (plate 38, fig. 253) : Side-pieces about twice as long as wide, tips 

 conieally tapered; basal lobes conical, similar in shape to side-pieces, setose at 

 tips. Clasp-filament stout, expanded outwardly, excavated subapically, with a 

 minute terminal tooth and articulated spine. False harpes slender, rod-like. 

 False harpagones divided into a number of portions, the inner one furcate, the 

 others forming loops and angles. 



Larva, Stage IV. — Head elongate, broadly elliptical, widest through eyes, 

 front margin arcuate, the clypeus emarginate and with stout prominent spines ; 

 antennae small, moderately stout, nearly smooth, with a single hair near base; 

 upper and lower pairs of dorsal head-hairs single, thickened, but rather slender, 

 secondary pair well developed, double, ante-antennal tufts multiple. Air-tube 

 subcylindrical, about four times as long as wide, slightly tapered on outer half, 

 pecten reaching nearly to middle, of fine, closely-set, evenly spaced teeth, fol- 

 lowed by a large multiple hair-tuft. A large lateral plate on eighth segment, 

 with comb of nine pointed stout teeth on ite posterior margin. Anal segment 

 ringed by the plate which is spinose along posterior margin; dorsal tufts of five 

 long hairs on each side ; lateral tuft small, multiple ; ventral brush of few and 

 sparse rays, confined to the barred area; anal gills four, equal, very slender, 

 about as long as the segment. 



Mr. Busck says : " It was bred from deep hoof -prints in a swampy meadow. 

 The larvae are very elongate, with reddish body, deep black head, and com- 

 paratively short tube; they are easily overlooked, as they go down at the least 

 disturbance and remain at the bottom for a long time, burrowing in the mud." 



Panama. 



Tabemilla, Canal Zone, May 2, 1907 (A. Busck). 



The imago varies in the amount of white scaling on the basal part of the first 

 vein of the wings; in the type series before us the white occupies from about one- 

 fourth to nearly one-half the length of the vein. 



URANOT.a;inA TYPHLOSOMATA Oyar & Knab. 



XJranotmnia typMosomata Dyar & Knab, Journ. N. Y. Bnt. Soc, xv, 200, 1907. 

 Vranotmnia typhlosomata Busck, Smith. Misc. Colls., quart, iss., lii, 62, 1908. 

 Uranotwnia typhlosomata Theobald, Men. Cullc, v, 505, 1910. 



Obioinai, Description of UnANOTiENiA typhlosomata: 



cJ. — Proboscis long and slender, much swollen at the apex, black scaled; an- 

 tennae amply plumose; palpi very short, black scaled; occiput black scaled, the mar- 

 gins of the eyes broadly bluish-white scaled; mesonotum brown, with minute dark- 

 brown scales; scutellum with metallic-blue scales, the setae long, black; in front 

 of the roots of the wings is a short stripe of silvery-blue scales and a similar blue 

 stripe extending over the anterior half of the pleura and over the prothoracic 

 lobes; metanotum dark brown; abdomen depressed, black scaled above and at the 

 sides; legs black with bronzy luster, the knees with a minute silvery spot and at 



