124 MOSQUITOES OF NOKTH AMERICA 



dense, broadly ovate, many obliquely subtmncate, black, with a blue reflection 

 on the costa. Halteres largely blaclash. 



Legs rather long and slender, black, with a bronzy and blue reflection, femora 

 whitish beneath, except at their apices ; tibise and tarsi with a brighter bronzy 

 luster beneath; hind tarsi silvery white beneath on last two joints. Claw 

 formula, 0.0-0.0-0.0. 



Length : Body about 3 mm ; wing 3 mm. 



Male. — Proboscis as in the female. Palpi small and slender, smaller than in 

 the female. Antennae similar to those of the female, the joints with smaU, sec- 

 ondary subapical whorls, hairs of basal whorls longer and more abundant than in 

 the female. Coloration similar to the female. Abdomen subcylindrical, ex- 

 panded apically, with termiaal series of coarse black bristles ; claspers somewhat 

 conspicuous. Wings with venation and vestiture similar to those of the female. 

 Front and mid legs with a strong brassy luster beneath, the hind tarsi colored as 

 in the female. Claws of mid tarsi unequal, the longer ones strongly curved; 

 formula, 0.0-0.0-0.0. 



Length : Body about 2.5 mm ; wing 3.7 mm. 



Genitalia (plate 5, fig. 34) : Side-pieces over twice as long as broad, the tips 

 conically tapered; a long hair outwardly towards the tip; basal appendages 

 long, resembling the side-pieces and either approximated to them or fused, a 

 long filament arising from the tip close to insertion of clasp-filament, the tip 

 angled, then expanded and cleft. Clasp-filament with a long slender stem 

 which divides at the tip into three small lobes, outer one smooth, middle one 

 with four teeth, outer one with a row of hairs. Harpes with thickened margins, 

 tips curved, obscurely dentate. Harpagones and unci forming small basal 

 cylinders. Basal appendages represented by four leaf-like setae on each side. 



Larva, Stage IV (plate 90, fig. 288). — Head subquadrate, anterior margin 

 rounded, with distinct angles posteriorly, occipital foramen reaching the angles ; 

 upper and lower head-hairs single, the tuft above the mouth double, ante- 

 antennal tuft in threes ; antennae small, uniform, a small hair at outer fourth. 

 Lateral abdominal hairs multiple on first two segments, double on third to sixth. 

 Lateral comb of eighth segment of many spines in a large patch about three rows 

 deep, followed by a single hair. Air-tube about four times as long as wide, 

 subcylindrical, apical third conicaUy tapered; three separated single hairs on 

 dorsal aspect, three on ventral aspect, the two most basal ones separated by a 

 false pecten of two or more stout teeth. Anal segment as long as wide, vrith a 

 large dorsal plate which is roughened with small spicules on its posterior central 

 portion ; dorsal tuft of five long hairs on each side ; lateral tuft of two long hairs ; 

 subventral tufts moderate, multiple. Anal gUls longer than anal segment, stout, 

 rounded at their tips, equal. 



The larvae live in the water in the flower-cups of a species of Heliconia with 

 upright flowers. Mr. Jennings obtained them several times in Heliconia of 

 the types of champneiana and leuteofusca. 



Panama. 



Tabemilla, Canal Zone, May 29, 1908 (A. H. Jennings) ; February 4, 1909 

 (L. Espey). 



One of the original types of this species proves to belong, judging from the 

 host plant, to Wyeomyia eloisa. The captured females are indeterminable, as 

 this and the species W. pseudopecten and W. eloisa are alike in the female adults. 

 The species may be separated readily by the male genitalia. 



In the larva, the number of false pecten-teeth on the air-tube varies; between 

 two and four, as in the two preceding and the following species {pseudopecten, 

 eloisa and onidus) ; we have failed to find any reliable character for distinguish- 

 ing the larvae of these species. 



