AEDES VITTATA 693 



anal fins are large, rounded, with median rib and double-contoured border towards 

 the base of each fin; a distinct apical dorsal tuft on the last segment. 

 Length. 5 mm., with anal fins 6 mm. 



DeSCKIPTION of FEMAI.E OF AeDES VITTATA (LaKVA UNKNOWN ) : 



Female. Proboscis moderately slender, subcylindrical, flattened, labellas 

 conically tapered; vestiture brownish-black; setre minute, curved, black, those 

 on the labellae more prominently outstanding. Palpi rather stout, short, less 

 than one-fourth as long as the proboscis, clothed with black scales, the tips and 

 bases of the joints with yellowish-white scales ; setae moderate, black. iVntennae 

 with the basal joints somewhat shorter than the distal ones, second joint larger 

 and thicker and pale at base, the remaining joints rugose, blackish, pilose ; tori 

 subspherical, with a cup-shaped apical excavation, ochcr yellow, dark brown on 

 inner side ; hairs of whorls sparse, black. Clypeus short, convex, conical, nude. 

 Eyes black. Occiput blackish, broadly clothed with coarse, narrow, curved, 

 pale-yellow scales, mixed with pale brownish ones at the sides, many erect, 

 broad, truncate yellowish white scales on the nape, some slender, erect, forked 

 brown scales toward the sides; cheeks and margins of eyes clothed with fiat 

 white scales, a patch of black ones well up the sides near eye-margin; bristles 

 bordering eyes black, a tuft of pale ones projecting forward at vertex. 



Prothoracic lobes elliptical, remote dorsally, blackish, clothed ^vith pale yel- 

 low scales and black bristles. Mesonotura dark brown, clothed with narrow, 

 curved golden-brown scales, the anterior and lateral margins narrowly and two 

 narrow subdorsal lines as well as the antescutellar area of yellowish white scales ; 

 bristles moderate, black. Scutellum trilobate, luteous, each lobe with a group of 

 black bristles and clothed with pale-yellow scales. Postnotum elliptical, short, 

 luteous, pruinose, nude. Pleurge and coxae pale brown, clothed with elliptical 

 white scales and rows of short, pale bristles; the scales on the prothoracic epi- 

 mera are yellowish and narrow, like those on the margin of mesonotum. 



Abdomen subcylindrical, flattened, the posterior segments tapering ; dorsal 

 vestiture of black scales, each segment with a rather broad basal band of creamy 

 white scales ; on the sides the bands widen into large triangular spots, particu- 

 larly on the sixth and seventh segments; first segment with a large patch of 

 white scales and many long, pale setae ; venter clothed with creamy white scales 

 with some black ones intermixed medianly near the hind margins and on the 

 posterior segments tending to form a longitudinal stripe. Cerci black. 



Wings moderate, hyaline; petiole of second marginal cell somewhat shorter 

 than its cell, that of second posterior cell about the same length as its cell ; basal 

 cross-vein more than its own length distant from anterior cross-vein ; scales of 

 the veins black with a few pale ones intermixed, most conspicuous on the sub- 

 costal vein ; outstanding scales long, broadly linear with blunt tips. Halteres 

 entirely pale. 



Legs moderately long, rather slender; femora clothed with creamy scales 

 below, black and whitish ones about evenly intermixed above, tips narrowly 

 pale ; tibias with black and whitish scales intermixed, the white ones tending to 

 form lines, the black ones predominating at apex, the stiff outstanding setae 

 black; tarsi black, first four joints of hind ones with a broad basal ring of white 

 scales, first joint with some white scales scattered over the surface, last joint 

 wholly black ; on the front and middle tarsi the bands are narrow and the last 

 joint is wholly black. Claw formula, 1.1-1.1-1.1. 



Length : Body about 5 mm. ; wing 4.5 mm. 



We have no specimen of the male. 



Life history and habits unknown. 



New Mexico. 



Pecos Canyon, June 25 (Grabham and Cockerell). 



