714 MOSQUITOES OF NORTH AMERICA 



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

 distant less than its own length from anterior cross-vein ; scales on costa and 

 first veins small and narrowly triangular, black and yellowish-white evenly 

 intermixed; on the other veins the outstanding scales are long, broadly linear to 

 narrowly ligulate, almost wholly blackish, a few pale ones intermixed. Halteres 

 pale. 



Legs moderately long ; femora yellowish-white scaled beneath, black and whit- 

 ish evenly intermixed above; knees yellowish-white; tibia similar, with more 

 black scales, these predominating on upper side, the pale ones forming a line on 

 inner surface, hind pair black at tips ; hind tarsi with second to fifth joints black 

 and broadly white-ringed at bases, first joint not distinctly ringed but with the 

 yellowish scales predomiuating nearly to tip; pale rings on front and middle 

 tarsi narrower, the last joint wholly black. Claw formula, 1.1-1.1-1.1. 



Length : Body about 5.5 mm. ; wing 5 mm. 



Male. — Proboscis slender and straight. Palpi slightly exceeding the pro- 

 boscis, slightly swollen apically; end of long joint and the last two joints with 

 long black and yellowish hairs ; vestiture of black and pale scales intermixed, the 

 black scales predominating at apices, the pale scales at bases of joints ; long 

 joint black with a distinct median white ring and patches of white scales towards 

 base and subapically. Antennae plumose, the last two joints long and slender, 

 rugose, pilose, black, the others short, pale, with dark, enlarged, annular inser- 

 tions of hair-whorls ; hairs of whorls long, dense, brown with yellowish luster. 

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

 of the fork-cells longer, the vestiture sparse. Abdomen elongate, depressed, the 

 pale scales yellowish white and massed basally and laterally; lateral ciliation 

 long, abundant and pale. Claw formula, 1.1-1.1-1.1. 



Length : Body about 6 mm. ; wing 5 mm. 



Genitalia (plate 36, fig. 179) : Side-pieces three times as long as wide, 

 rounded at tips; apical lobe developed, separated from basal one; basal lobe a 

 long stout conical prominence, densely setose, without a thick spine. Clasp- 

 filament long, slender, uniform, with three small setae outwardly near tip and a 

 long articulated terminal spine. Harpes elliptical, margins revolute, tip pointed 

 and bent. Harpagones with long, slightly curved columnar stem and terminal, 

 long and rather broad filament of nearly uniform width. Basal appendages 

 small, rounded, bearing stiff spines. 



The larval habits have not been observed, but the data indicate development 

 in the snow-water pools of early spring. Mr. Knab, at Wumipeg, found males 

 still present late in June and the females abundant and in fresh condition ; they 

 were taken in woods along the banks of the Assiniboine Eiver. The females bite 

 both by day and night. 



Manitoba and central northern United States. 



Winnipeg, Manitoba, June 21 and 22, 1907 (F. Knab) ; Aweme, Manitoba, 

 June 2, 1904, June 24, 1907 (N. Criddle) ; Saxeville, Wisconsin, June 2, 1909 

 (B.K.Miller).' 



AEDES EUEDES, new species. - "'" •' <:^<*" '-^ 

 Aedes riparius Gibson (in part). Kept. Ent. See. Ontario, 1908, 109, 1909. 

 Dbscbiption of Femaie and Maue of Aedes etjedes (Labva Unknown) : 



Female. — Proboscis moderate, uniform, the labellae conically tapered; vesti- 

 ture black, with a sprinkling of lighter scales ; setse minute curved, black, those 

 on the labellse more prominently outstanding. Palpi about one-fourth as long 

 as the proboscis, clothed with black scales and some scattered white ones, the 

 setae moderate, black. Antennae with the joints subequal, rugose, pilose, black, 

 second joint somewhat larger, pale ferruginous ; hairs of whorls rather short, 

 sparse, black; tori subspherical, with a cup-shaped apical excavation, luteous, 

 on inner side shading to brown and with a patch of small white scales. Clypeus 



