88 MOSQUITOES OF NORTH AMERICA 



Desceiption of Female, Male, and Labva of Wyeomtia pandora: 



Female. Proboscis moderate, swollen apically, vestiture black, with a bronzy 

 and blue reflection, slightly paler beneath ; labellae small, rounded, with fine out- 

 standing setae. Palpi short, flattened, one-fifth as long as proboscis, bronzy 

 black. Antennae moderate, the joints slender, subequal, rugose, coarsely pilose, 

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

 slight pruinosity ; hairs of whorls long, rather sparse, black. Clypeus rounded, 

 convex, elongate, blackish, slightly pruinose. Eyes separated at the vertex by , 

 narrow wedge, bluish black. Occiput clothed with flat black scales with bronzy 

 and blue reflection, a silvery patch below ; two setce at vertex and smaller ones 

 along margin of eyes. 



Prothoracic lobes large, distinctly separated, clothed with flat, shining blue 

 and violaceous scales with a coppery reflection in some lights and a silvery patch 

 at base ; a row of setae along anterior margin. Mesonotum clothed with ellip- 

 tical, flat, dark-brown scales, with bronzy and blue reflection ; scales below lateral 

 angles bronzy; setae over the roots of wings dark brown. Scutellum trilobate, 

 with vestiture similar to and continuous with that of mesonotum, each lobe with 

 a small tuft of black bristles. Postnotum elliptical, prominent, dark brown, a 

 small group of setae near the posterior margin. Pleurae dark brown, coxge 

 luteous, clothed with elliptical, flat silvery-white scales. 



Abdomen subcylindrical, compressed, truncate apically, and with many long 

 dark-brown terminal setas ; dorsal vestiture black with a slight metallic reflec- 

 tion; venter silvery white, the scales somewhat raised along the mid- ventral 

 line ; colors separated on sides in a straight line. 



Wings moderate, hyaline ; petiole of second marginal cell less than one-third 

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

 vein close to anterior cross-vein; scales of veins dense, broadly ovate or rounded 

 triangular, black, with a blue reflection on costa. Halteres whitish with black 

 knobs. 



Legs rather long and slender, black with bronzy and blue reflection, the 

 femora pale brassy beneath ; tibise and tarsi pale bronzy beneath ; mid tarsi with 

 apical three-fourths of the second and all of the succeeding joints white on outer 

 side; hind tarsi with last two joints silvery white all around. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 3.5 mm. ; wing 3 mm. 



Male. Proboscis longer and more slender than in female. Palpi slender, one- 

 sixth as long as proboscis. Antennae similar to those of the female, the joints 

 with small secondary subapical whorls, basal whorls longer and more abundant 

 than in the female. Coloration similar to the female. Abdomen subcylindrical, 

 somewhat compressed, somewhat expanded at tip, with abundant terminal setae, 

 claspers visible from above. Wings with petiole of second posterior cell about 

 half as long as its cell, cross-veins nearly incident, vestiture as in the female. 

 Front and mid legs with a pale-brassy luster beneath, the mid legs with the last 

 four tarsal joints silvery white on outer side ; hind legs bronzy beneath, the last 

 two joints silvery all round ; mid tarsi with a single long, strongly curved claw, 

 claws of hind tarsi slightly unequal ; formula, 0.0-0-0.0. 



Length : Body about 3.3 mm. ; wing 3 mm. 



Genitalia (plate 3, fig. 11) : Side-pieces over twice as long as wide, the tip 

 much tapered ; three long setae in a row. Clasp-filament with slender stem, the 

 tip roundedly expanded, a slender lobe at base of expansion and two outer on it, 

 one slender and hooked, the other broad and with coarse short spines; many 

 sets on the expansion. Harpes elliptical, concave, the margin thickened, tip 

 curved and pointed. Harpagones forming a basal cone. Unci forming a similar 

 smaller cone. Basal appendages small, each with two or three short, stiff setae. 



