584 MOSQUITOES OF NORTH AMERICA 



reddish brown lateral eiliation. Wings narrower than in the female, the stems 

 of the fork-cells much longer, the petiole of the second marginal cell being 

 longer than the cell; clothing of veins scantily developed. Claw formula, 

 3.1-2.1-0.0. 



Length : Body about 4 nun. ; wing 3 mm. 



Genitalia (plate 23, fig. 154) : Side-pieces about twice as long as wide, tips 

 expanded by a conically tapered apical lobe which forms a regular continuation 

 of side-piece. Clasp-filament stout, greatly swollen in the middle on the inner 

 side, a rather long stout articulate apical spine. Harpes fiat, concave, inner 

 margin thickened and revolute, widely cleft at apex, forming a short point pro- 

 jecting laterally. Harpagones with a ligulate base and expanded tip bearing 

 five very stout setae in a row. Unci approximate, forming a rather slender comb 

 with revolute margins touching along mid line. 



Larva, Stage IV (plate 115, fig. 394) . — Head rounded, widest through eyes, 

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

 Antennae moderate, not as long as head, well spined, the tuft slightly beyond the 

 middle ; four spines and a digit on a pedicel at tip. Dorsal head-tufts multiple. 

 Mental plate elongate triangular, with a central tooth and thirteen on each side, 

 the bas^ ones more remotely spaced and broader. Mandible quadrangular; a 

 long filament and two short ones before tip; an outer row of cilia from a collar ; 

 a row of conical prominences on outer margin, each bearing a single feathered 

 hair and tuft of short ones ; dentition in continuation of margin, of four teeth, 

 the first the longest; a slender tooth before: a broad tooth at base with six 

 cusps ; a coarsely serrate filament and row of three hairs within ; process below 

 roundedly infiated, furcate, a row of hairs near outer margin and a tuft at tip 

 of each limb; basal angle prominent; a row of hairs within, nearly continuous 

 with ba^al row. Maxilla conical, divided by a suture ; inner half with long spines 

 on margin, the apical ones feathered, a row of cilia within ; a single articulated 

 filament near the apex and adjoining the suture ; a row of long hairs at tip ; a 

 spine on outer margin. Palpus short and stout, with four rudimentary digits. 

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

 shorter. Air-tube infiated, subfusiform, tapered on outer half ; pecten of three 

 teeth on basal fourth ; single tooth furcate, or with two to five basal branches ; 

 a small tuft at outer third. Lateral comb of eighth segment of six scales on a 

 weak membranous plate; single scale with trifid apex and small lateral serra- 

 tions. Anal segment longer than wide, ringed by the plate ; dorsal tuft a brush 

 and long hair on each side; a small lateral tuft; ventral brush well developed, 

 preceded by tufts along the ventral line toliase, piercing the chitinous ring. 

 Anal gills long, twice as long as the segment, regularly tapered. 



The eggs have been described by Taylor. They are deposited singly, are large, 

 black and spiny, resembling those of other members of the genus ; Taylor gives 

 the length as 0.76 vam. and the greatest diameter 0.24 mm. and states that from 

 50 to 75 are deposited. 



The larvae occur in natural collections of water upon the ground and develop 

 rapidly. Mr. Busck found them numerous in a large pig-pond near a road, in a 

 rain puddle in mountainous country, and in a pot-hole in stones. Mr. Schwarz 

 captured adults in the woods and fields, and once in the house. Taylor states 

 that this is a rural species and that its appearance coincides with the season 

 of rains. " Generally not found in houses, evidently securing from cattle the 

 blood necessary for its propagation. The bite is slightly painful." 



Greater Antilles and Bahama Islands. 



Bayamon, Porto Eico, January, 1899 (A. Busck) ; San Francisco Mountains, 

 Santo Domingo, August 29, September 8, 1905 (A. Busck) ; Kingston, Jamaica 

 (M. Grabham) ; Cayamas, Cuba, June 6 (E. A. Schwarz) ; Havana, Cuba, 



