372 MOSQUITOES OF NOETH AMERICA 



the first with a narrow transverse band of white scales, the one on second seg- 

 ment represented by a small pointed patch; bands widened on sides; last seg- 

 ment entirely white scaled; venter clothed with yellowish-white scales; mem- 

 brane beneath dark; hairs at ends of segments pale and long, the tip bristly. 



Wings moderate, hyaline; petiole of second marginal cell about one-fourth as 

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

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

 dark brown, linear, those on forks of second and fourth vein broader and denser. 

 Halteres whitish, with brown knobs. 



Legs moderate, uniform; femora and tibiae clothed above with black scales 

 with a bluish and bronzy luster ; femora beneath broadly white to tips except hind 

 pair, hind tibiae whitish within; front and middle tibiae and tarsi with a brassy 

 shade on under side ; knees and tips of tibiae whitish. Claw formula, 0.0-0.0.0.0. 



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



Male. — Proboscis gradually but distinctly swollen towards apex, bronzy black; 

 above with a pale shade at middle, more distinct below. Palpi exceeding pro- 

 boscis by more than the length of the last joint, slender, uniform, apical portion 

 somewhat enlarged ; vestiture black, with paler scales on long joint and with a 

 line of pale scales on under surface, rather long black hairs at end of long joint 

 and on last two. Antennas rather long, plumose; last two joints long and 

 slender, rugose, pilose, black, the others short, but rather longer than usual, 

 whitish, with black enlarged rings at insertion of hair-whorls ; hairs long, black ; 

 tori entirely brown. Coloration similar to the female. Abdomen long, de- 

 pressed, nearly parallel-sided; basal bands broad, those on sixth and seventh seg- 

 ments expanded at the sides, eighth segment mostly black sealed ; lateral cUia- 

 tion moderate, rather irregular, pale brovm. Wings narrower than in the 

 female, the stems of the fork-ceUs longer, vestiture sparser. Claw formula, 

 1.1-1.1-0.0. 



Length : Body about 3.2 mm. ; wing 3.8 mm. 



Genitalia (plate 15, fig. 105) : Side-pieces over twice as long as wide, tips 

 rounded with quadrate apical projection bearing three curved rods with hooked 

 tips, leaf -like appendage and a setae ; clasp-filament moderate, slightly inflated 

 centrally with a terminal articulated spine. Harpes divided, the inner branch 

 bearing a large tuft of spines at tip, the outer long and curved; harpagones 

 divided, one branch forming a slender curved spatulate process reaching to spi- 

 nose tips of harpes. "Unci obscured. Basal appendages, abort, remote, setose. 



Larva, Stage IV (plate 100, fig. 339). — Head rounded, widest through eyes, 

 bulging on sides, a large notch at insertion of antennae, front margin arcuate. 

 Antennae large, slightly ciirved, thick on basal two-thirds, well spinulated, with 

 a large hair-tuft from a notch; two long setae before tip, a long seta, a short 

 one and a digit at tip. Dorsal head-hairs in threes, the ante-antennal tufts 

 multiple. Mental plate triangular, straight on sides ; a prominent medium tooth 

 and nine on each side, penultimate one large and slightly projecting. Mandible 

 quadrangular ; two filaments and a tuft of hairs before tip ; an outer row of cilia 

 from a collar ; a row of transverse rounded prominences on outer margin bearing 

 hair-tufts ; dentition of four teeth on a process, first much the longest ; a spine 

 before, a small tooth and a large trifid one at base, a long serrate filament and a 

 row of feathered hairs within ; process below elongate, with two angular promi- 

 nences on outer edge bearing rows of hairs, tip obscurely furcate; basal angle 

 small, a row of hairs within with slightly enlarged bases ; a row of long basal 

 hairs. Maxilla elongate with conical tip, divided by a suture ; inner half with a 

 row of stout spines on margin, some of basal ones feathered, two rows of cilia 

 within; a row of long hairs at tip running down along suture; outer half with 



