452 MOSQUITOES OP NORTH AMERICA 



along margins of eyes, scattered erect, forked black scales dorsally, a row of 

 coarse, black bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with black bristles. 

 Mesonotum dark brown, pale along margins, clothed with narrow, curved 

 bronzy-brown scales; bristles coarse, brown. Scutellum trilobate, mid lobe 

 large, vestiture paler than on mesonotum, with a group of black bristles on each 

 lobe. Postnotum, elliptical, prominent, dark brown, pale on lateral margins, 

 nude. Pleurae and coxae pale greenish, with a transverse broad dark band across 

 the middle and another below roots of wings, the lower one more distinct, a 

 silvery pruinose shade between them, a few white scales below and rows of pale 

 bristles. 



Abdomen subcylindrical, truncate at tip ; dorsal vestiture black with a slight 

 blue reflection, a row of lateral, small, basal, segmental, dull whitish patches 

 which, on the posterior segments, extend dorsally to form very narrow bands; 

 venter dull yellowish white 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 dis- 

 tant twice its length from anterior cross-vein ; scales of veins brown, with a blue 

 reflection along costa, outstanding ones long, sparse, narrowly ligulate, denser 

 on forks of second vein. Halteres pale, with blackish knobs. 



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

 femora whitish beneath to apices; tibiae and tarsi with a brassy reflection 

 beneath. Claw formula, 0.0-0.0-0.0. 



Length : Body about 3.5 mm. ; wing 2.5 mm. 



Larva, Stage IV (plate 104, fig. 345). — Head rounded, widest through eyes, 

 somewhat produced anteriorly. Upper pair of dorsal head-hairs in threes, mod- 

 erate, lower pair single, long; ante-antennal tuft multiple. Antennae short, 

 uniform, a small single hair slightly beyond middle. Lateral abdominal hairs 

 in twos after second segment; comb of eighth segment of many spines in a 

 large patch. Air-tube about five times as long as wide, tapering outwardly; 

 pecten of small teeth reaching basal third; four long posterior tufts in a straight 

 row, all three-haired, the basal one within pecten followed by a small single hair; 

 terminal hooks minute. Anal segment about as long as wide, ringed by the 

 plate, which has small spines on its posterior margin ; dorsal tuft of two long 

 hairs on each side; lateral tuft of two long hairs; ventral brush sparse, con- 

 fined by the chitinous ring. Anal gills long, flexuous, about three times as long 

 as the segment, pointed, equal. 



The larvae live in the water between the leaves of Bromeliaceae. 



Island of Trinidad, West Indies ; probably also in Brazil. 



Trinidad (F. W. Urich). 



Subgenus CLIMACURA, new. 



We establish this subgenus for Culex melanurus Coquillett. While we are 

 unable to point out tangible generic characters for the adults of both sexes, we 

 are convinced that the species ultimately will be separated generically. The 

 male genitalia depart widely from the Culex type, and are much more primitive 

 in structure. In both sexes the empodia are of unusual structure, and consist 

 of a deeply serrate chitinous plate, distinctly a specialization. The egg-laying 

 habits are less specialized than in Culex, the eggs being deposited singly upon 

 the water surface. Culex melanurus has many points in common with C. dyari, 

 both being generalized forms and anomalous in the genus Culex; but they are 

 not closely related and, when removed, will have to be placed in separate genera. 



