AEDES EIPARIUS 713 



Original Desckiption of Aedes ripabius : 



$. Proboscis slender, dark scaled with a sprinkling of lighter yellowish scales, 

 particularly towards the base; palpi short, dark scaled, with the apex and the 

 median segments lighter scaled; occiput yellow scaled with brassy luster, a large 

 brown spot on each side of the middle and another one well down the side; protho- 

 racic lobes yellow scaled; mesonotum bright ferruginous brown with silky luster, at 

 the bases of the wings and on the antescutellar area light yellow scaled, two subme- 

 dian narrow longitudinal yellow lines reach the base on each side of the antescutellar 

 area; scutellum yellow scaled, the setae abundant and concolorous with the scales; 

 metanotum brown; postscutellum clothed with dull yellowish white scales and with 

 pale hairs; abdomen clothed principally with light scales above, at the bases of the 

 segments the scaling is dull yellowish white and shades off into a light ferruginous on 

 the lighter scales, on the apical two-thirds of the segments there is a strong sprink- 

 ling of dusky scales which becomes predominant on the second, third and fourth 

 segments, beneath the abdomen is entirely yellowish white scaled; legs with the 

 femora and tibiae pale ochreous scaled with a sprinkling of blackish scales which 

 becomes very heavy at the apices, particularly on the tibiae; tarsi black, with very 

 broad basal yellowish white rings. Claws all toothed. Wing-scales brown, heavily 

 sprinkled with yellow ones in the costal region, the scales long and narrow. Length 

 5.5 mm. 



1^. Palpi slightly longer than the proboscis, clothed with dusky and yellowish 

 scales, which latter tend to form bands, the apical half densely clothed with brown 

 and pale ferruginous hairs with a silky luster; abdomen long and slender, the apical 

 half depressed, the marginal cilia long and dense, pale yellow. Length, 6 mm. 



Sixty-eight specimens, Winnipeg, Manitoba, Canada (F. Knab), found along the 

 banks of the Assiniboine River, among the trees. The female bites both by day and 

 night. 



Type. No. 10875, U. S. National Museum. 



Description of Female and Male of Aedes riparius (Larva Unknown) : 



Female. Proboscis moderate, nniforai, the labellse conically tapered; vesti- 

 ture black intemiixed with dull yellowish-white scales which almost form a band 

 on central half ; setas minute, curved, black, those on the labellse more promi- 

 nently outstanding. Palpi short, about one-fourth as long as the proboscis, 

 clothed with black and a few whitish scales at apices of Joints; setae moderate, 

 black. Antennae with the joints subequal, rugose, pilose, black, the second joint 

 somewhat larger, brown at its base; hairs of whorls sparse, moderate, black; 

 tori subspherical, with a cup-shaped apical excavation, brown, on inner side 

 shading to black and with a patch of small white scales. Clypeus rounded tri- 

 angular, prominent, dark brown, nude. Eyes black. Occiput black ; vertex 

 densely and broadly clothed with narrow, curved scales, golden yellow in the 

 middle, a patch of brown ones laterally, a black quadrate spot well down on the 

 side, on vertex many slender erect truncate or notch-tipped black scales, the 

 median ones pale; cheeks clothed with flat yellowish white scales. 



Prothoracic lobes elliptical, remote dorsally, clothed with golden-brown 

 scales and black bristles. Mesonotum blackish brown, clothed with narrow, 

 curved scales, bright reddish golden brown medianly, straw-colored on the sides 

 and around the antescutellar space, broadly over the roots of the wings and in a 

 narrow stripe each side of the antescutellar space. Scutellum trilobate, clothed 

 with narrow, curved pale golden scales, each lobe with a large group of pale 

 bristles. Postnotum elliptical, prominent, brown, nude. Pleurae brown, coxae 

 luteous, clothed with elliptical flat white scales; prothoracic epimera clothed 

 with golden brown scales similar to those on mesonotum. 



Abdomen subcylindrical, tapering posteriorly ; dorsal vestiture of pale brown- 

 ish-yellow and black scales, the segments black scaled in the middle, pale at 

 bases and tips, with many pale scales scattered throughout the black portion, 

 the pale scales largely predominating on the last two segments; first segment 

 white scaled and with many pale setse ; venter almost Avholly dull yellowish white 

 scaled, an indistinct, ragged, median black line in some specimens. Cerci black. 



Wings moderate, slightly infuscated ; petiole of second marginal cell shorter 



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