CULEX OCELLATUS 447 



Description of Female, Male, and Larva of Culex ocellatus: 



Female. Proboscis lonof, moderately expaiuled at tip, labellie conically ta- 

 pered ; vestiture black with a bronzy reflection ; setse minute, curved, black, those 

 on labellae more prominently outstanding. Palpi short, one-fifth as long as 

 proboscis, slender, uniform, black, with a few outstanding setag at base. Antennae 

 moderate ; joints subequal, rugose, pilose, blackish, the second joint longer than 

 third and no stouter; tori subspherical, with a cup-shaped apical excavation, 

 luteous, brown on inner side ; hairs of whorls sparse, moderate, black. Clypeus 

 rounded triangular, prominent, brown, nude. Eyes black. Occiput black, 

 clothed with narrow, curved pale brownish scales dorsally, with many erect, 

 forked ones intermixed, margins of eyes broadly white scaled, broad, flat white 

 scales on the cheeks and reaching well up on sides ; a row of coarse black bristles 

 along margins of eyes. 



Prothoracic lobes pale ; vestiture of brown bristles. ^lesonotum light brown, 

 with two impressed longitudinal lines on anterior two-thirds, a large semi- 

 circular black bare spot in the membrane over root of wing, surrounded by a 

 broad, pale brown, bare, slightly pruinose zone; vestiture of narrow, curved 

 bronzy-brown scales; bristles long, coarse, brown. Scutellum trilobate, with 

 similar vestiture to mesonotum, each lobe with a group of brown bristles. Post- 

 notum elliptical, prominent, brown, pale on lateral margins, nude. Pleurae and 

 coxa? luteous, with a transverse dark band above base of coxae and a small 

 diffused spot in a whitish field beneath wings ; a broad transverse band of white 

 pruinosity immediately above black band. 



Abdomen subcylindrical, truncate at tip; dorsal vestiture uniformly bronzy 

 black, a row of dark bristles at tips of segments ; first segment with many pale 

 hairs ; venter pale scaled, grading into the dorsal color. 



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

 long as its cell, that of second posterior cell about equal to its cell ; basal cross- 

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

 with a blue reflection on the costa, outstanding ones broadly linear, denser out- 

 wardly, particularly on fork of second vein. Halteres whitish, with blackish 

 dorsal line and knobs. 



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

 femora pale Ijeneath to apices; tibia and tarsi with a brassy luster beneath. 

 Claw formula, 0.0-0.0-0.0. 



Length : Body about 2.5 mm. ; wing 2.2 mm. 



Male. Proboscis long, swollen at tip. Palpi about four-fifths as long as the 

 proboscis, slender, blunt at apices, uniform, a few stiff hairs at tips of segments, 

 uniformly bronzy black. Antennge plumose ; last two joints long and slender, 

 rugose, pilose, blackish, the others short, whitish, with broad black rings at in- 

 sertions of the hair-whorls ; hairs long, moderately dense, brown. Coloration 

 similar to the female. Wings scarcely narrower than in the female, the stems of 

 the fork-cells slightly longer, vestiture about the same. Abdomen subcylindrical. 

 tip slightly expanded and with somewhat paler scales, very bristly; lateral 

 ciliation rather coarse and short, brown. Claw formula, 1.0-1.0-0.0. 



Length : Body about 2.5 mm. ; wing 2 mm. 



Genitalia (plate 9, fig. 59) : Side-pieces more than twice as long as wide, tips 

 conically tapered, a low median prominence bearing three rods each on a sepa- 

 rate elevation. Clasp-filament short, rather thick, with an inserted terminal 

 appendage. Harpes with a long, slender inner branch expanded at tip aiid 

 divided into a number of teeth reaching to prominence of side-piece. Harpa- 

 gones divided at right angles, both branches smooth, inner one long. Basal 

 appendages remote, slender, elongated, bearing a few setae. 



