AEDES BKACTEATUS 803 



Prothoracic lobes elliptical, remote dorsally, dark brown, with pale yellow 

 scales and with numerous black bristles. Mesonotum dark brown, clothed with 

 narrow, curved scales, very broadly coppery golden-brown on disc, indistinctly 

 indented laterally before middle, dark bronzy-brown along lateral margins, two 

 brown subdorsal spots posteriorly before antescutellar space ; scales about ante- 

 scutellar space paler; setae rather short, dark brown. Scutellimi trilobate, 

 brown, clothed with narrow, curved golden scales, each lobe with a group of 

 blackish bristles. Postnotimi elliptical, prominent, dark brown, nude. Pleurae 

 brown, coxae luteous, clothed with patches of elliptical white scales and rows of 

 pale bristles. 



Abdomen subcylindrical, somewhat flattened, tapering posteriorly; dorsal 

 vestiture dull black, narrow bands of sordid white scales at bases of segments, 

 triangularly widened in the middle, absent on last segment, a row of large, seg- 

 mental, lateral, triangular, basal yellowish-white patches extending to apical 

 margins ; first segment dark or pale scaled, with many fine pale hairs ; venter 

 yellowish-white scaled. Cerci black. 



Wings moderate, hyaline; petioles of second marginal and second posterior 

 cell shorter than their cells and about equal ; basal cross-vein distant more than 

 its own length from anterior cross- vein ; scales brownish-black, the outstanding 

 ones narrowly ligulate, denser on forks of second vein. Halteres blackish, with 

 whitish knobs. 



Legs moderately slender; vestiture bronzy-black with bluish luster; femora 

 beneath yellowish-white except at tips, under sides of tibiae with a whitish re- 

 flection and a few pale scales at bases of first tarsal joints. Claw formula, 

 1.1-1.1-1.1. 



Length : Body about 4 mm. ; wing 3.5 mm. 



La/rva, Stage IV (plate 120, fig. 416). — Head rounded, widest through eyes, 

 narrowed before eyes, a notch at insertion of antennae, front margin arcuate. 

 Antennae moderate, slender, very sparsely spined, with a small hair-tuft at the 

 middle; three irregular spines and a digit on a pedicel at tip. Both pairs of 

 dorsal head-hairs single, ante-antennal tuft multiple. Mental plate elongate- 

 triangular, with a central tooth and fifteen on each side, the last two small, 

 irregular and remote. Mandible quadrangular, with coarse, stout spines out- 

 wardly at base ; two filaments from a notch before tip; an outer row of cilia from 

 a collar ; a row of filaments on outer margin ; dentition of four teeth on a 

 process, the first the largest; two spines before, two short bifid teeth at base, a 

 broad serrate filament and row of feathered hairs within, the outermost of which 

 is broadened at base; process below curved, strongly furcate, with a short row 

 of hairs on outer margin and a tuft at tip of each limb; basal angle moderate, 

 a row of three stout hairs and a detached one within ; a row of stout hairs at base. 

 Maxilla bluntly conical, divided by a suture ; inner half with a row of filaments 

 on margin from base to middle, their tips divided, a row of cilia from base to 

 apex, a tuft of long hairs at tip ; outer half with two filaments near apex ad- 

 joining the suture and a small spine on outer margin ; palpus short and stout, 

 with four minute apical digits. Thorax rounded, wider than long; abdomen 

 moderate, the anterior segments shorter; skin coarsely hairy. Air-tube tapered 

 outwardly, about two and a half times as long as wide; pecten teeth coarse, 

 rather long, running to middle, single tooth a long spine with three or four basal 

 branches ; a single Sift beyond the pecten. Lateral comb of eighth segment of 

 many scales in a rather small triangular patch; single scale short and broad, 

 evenly fringed with spinules. Anal segment as long as broad, ringed by the 

 plate ; dorsal tuft a long hair and brush on each side ; ventral brush well de- 

 veloped, confined to the barred area; anal gills short and stout, not as long as 

 the segment, tapered outwardly. 



