418 MOSQUITOES OF NORTH AMERICA 



Postnotum elliptical, prominent, luteous-brown, nude. Pleurae and coxae 

 luteous-brown, with rows of brown bristles and patches of dull white scales. 



Abdomen subcylindrical, truncate at tip ; dorsal vestiture brownish black, with 

 narrow whitish basal segmental bands, basal segment with a patch of dark scales, 

 second segment with only a few white scales in the middle, terminal one 

 whitish with a small apical dark band, a row of lateral, segmental, basal, tri- 

 angular white patches joined to the bands ; venter whitish scaled. 



Wings moderate, hyaline; petiole of second marginal cell one-third as long 

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

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

 with bluish reflection on costa, outstanding ones near tip of wing long and 

 linear, dense on forks of second vein. Halteres whitish, knobs darker. 



Legs slender, moderately long; vestiture black with bronzy reflection; femora 

 didl white scaled beneath to near apices; tibia and tarsi pale beneath with 

 brassy luster; knees and apices of tibiae pale. Claw formula, 0.0-0.0-0.0. 



Length: Body about 3 mm.; wing 2.8 mm. 



Male. — Proboscis straight, long and slender, enlarged apieally, a pale ring 

 beyond the middle, more distinct on under side. Palpi exceeding the proboscis 

 by nearly the length of the last two joints, which, with end of long joint, are 

 slightly enlarged and densely hairy; vestiture bronzy brown, a line of pale 

 scales on under side. Antennae plumose; last two joints long and slender, 

 rugose, pilose, black, the others short, whitish, with black thick rings at inser- 

 tions of hair-whorls ; hairs long, dense, silky brown. Coloration similar to the 

 female. Abdomen elongate, depressed, somewhat broadened on distal half; 

 dorsal white bands broader than in the female, those on fifth, sixth, seventh and 

 eighth segments laterally expanded; lateral ciliation fine and abundant, pale 

 brown. Wings narrower than in the female, the stems of the fork-cell longer; 

 vestiture sparser. Claw formula, 1.1-1.1-0.0. 



Length : Body about 3 mm. ; wing 2.5 mm. 



Genitalia (plate 15, fig. 112) : Side-pieces more than twice as long as wide, 

 conically tapered at tip, a slender quadrate median prominence, bearing four 

 rods, a leaf -like appendage and a seta. Clasp-filament, moderate, slightly en- 

 larged at base with an articulated terminal spine. Harpes divided, outer branch 

 slender, curved, pointed, smooth, inner short, truncate, stout and with a row of 

 terminal spines. Harpagones divided into a number of lamellae. Basal ap- 

 pendages, short, remote, bearing four stout hairs. 



Larva, Stage lY (plate 98, fig. 324). — Head rounded, widest through eyes, 

 a large notch at insertion of antennae, front margin arcuate. Antennae large, a 

 large tuft from a notch at outer third, apical third more slender ; three long setae, 

 a short one and a digit at tip ; basal portion well spinulated. Both pairs of dorsal 

 head-hairs long, in threes; ante-antennal tuft multiple. Mental plate tri- 

 angular, a large central tooth and nine on each side, last two smaller and more 

 remote. Mandible quadrangular ; two long filamente, a short one and a tuft of 

 hairs before tip ; a row of cilia from a collar ; a row of prominences on outer 

 margin bearing hair-tufts ; dentition of four teeth on a process, first longest ; a 

 spine before, four irregular teeth at base, a long smooth filament and five 

 feathered hairs within; process below curved, obscurely furcate, with a trans- 

 verse and a longitudinal row of hairs and hair-tufts at tip ; basal angle small ; 

 a row of hairs within and a row at base. Maxilla elongate, divided by a suture ; 

 inner half with two feathery hairs at base and a double row of spines on margin ; 

 two rows of cilia within ; a row of long hairs at tip running down along the 

 suture ; outer half with two filaments basally placed, a spine on the other side 

 and some slight hairs towards base. Palpus small, digits rather long, irregular. 

 Thorax rounded, wider than long. Abdomen moderate, anterior segments 



