628 MOSQUITOES OF NORTH AMERICA 



Fourteen specimens, Oxbow, Saskatchewan, Canada (F. Knab) ; Regina, Carnduff 

 and Qu'Apelle, Saskatchewan, Canada (T. N. Willing, through Dr. J. Fletcher) ; 

 Elsinore, Utah (E. S. G. Titus) ; Salt Lake, Utah (H. S. Barber). 



Type. — No. 10874, U. S. National Museum. 



Description of Fkmaib and Male or Aedes campestbis (Laeva Unknown) : 



Female. — Proboscis rather stout, uniform; labellEe conically tapered; vesti- 

 ture wholly black on outer half, intermixed with whitish toward base; setse 

 minute, curved, black, those on the labellae more prominently outstanding. 

 Palpi one-fourth as long as proboscis, rather roughly scaled, dark brown inter- 

 mixed with whitish. Antennae moderate, the joints subequal, rugose, pilose, 

 black, second joint longer than the following ones; tori subspherical, with a 

 cup-shaped apical excavation, luteous brown, largely covered with small whitish 

 scales. Clypeus rounded triangular, dark brown, nude. Eyes black. Occiput 

 densely clothed with narrow straw-colored scales, broader on the sides, vertex 

 with many dense, rather short, erect forked scales, pale brown centrally, a few 

 on the posterior and lateral edges of the tuft black ; a row of coarse, pale brown 

 setae along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with naiTow straw-col- 

 ored scales and dark brown bristles. Mesonotum black, densely clothed with nar- 

 row curved scales, pale straw-color, except a broad median stripe from near the 

 anterior edge to posterior third and a patch on each side of this behind the mid- 

 dle which are bronzy-brown; vestiture of lateral areas also brown; scutel- 

 lum trilobate, densely clothed with narrow, curved, straw-colored scales, each 

 lobe with a group of yellowish bristles. Pqstnotum elliptical, prominent, dark 

 brown, nude. Pleurae dark brown, coxae luteous, densely clothed with broadly 

 lanceolate, somewhat roughened, dull creamy white scales. 



Abdomen subcylindrical, tapering at tip, depressed; dorsum clothed with 

 whitish and black scales, the pale scales greatly predominating, the black ones 

 being present as diffused paired segmental subdorsal patches; venter largely 

 yellowish-white scaled, a few black ones intermixed in the median area. Cerci 

 black. 



Wings moderate, hyaline ; petiole of second marginal cell shorter than its cell, 

 that of second posterior cell about as long as its cell ; basal cross-vein distant 

 a,bout its own length from anterior cross-vein; scales of veins long, dense, 

 broadly linear to narrowly triangular, yellowish-white and black, the yellowish- 

 white largely predominating, the black scales evenly intermixed on all the veins. 

 Halteres pale with darker knobs. 



Legs slender; femora and tibiae clothed with yellowish-white scales with a 

 small proportion of black ones intermixed; tarsi with more numerous black 

 scales, the second to fifth hind tarsal joints black with yellowish-white rings at 

 their bases and apices, the last joint almost or wholly yellowish-white; fore 

 tarsi with last three joints dark ; mid tarsi with third to fifth joints with narrow 

 basal rings. Claw formula, 1.1-1.1-1.1. 



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



Male. — Antennae plumose, the last two joints long and slender, rugose, pilose, 

 black, the others short, especially the basal ones; hairs of whorls long, dense, 

 blackish and brown. Proboscis straight, slender. Palpi a little longer than 

 the proboscis, enlarged towards extremity, the last two joints and the end of 

 the long joint with long, dense, black and yellowish-ferruginous hairs. Colora- 

 tion similar to the female. Wings narrower than in the female, the stems of the 

 fork-cells longer; vestiture very sparse. Abdomen long, depressed; dorsal 

 vestiture almost wholly whitish ; lateral ciliation dense, long, yellowish. Claw 

 formula, 1.1-1.1-1.1. 



Length : Body about 6.5 mm. ; wing 6 mm. 



