AEDES SQUAMIGEK 707 



curved scales, mostly light bronzy brown but intermixed with dull yellowish- 

 white ones somewhat irregularly disposed along the margins of the disk, about 

 the antescutellar space and in a pair of narrow longitudinal lines. Scutellum 

 trilobate, gray, clothed with whitish scales, each lobe with a group of black 

 bristles. Postnotum elliptical, prominent, blackish with a white pruinosity, 

 nude. Pleurae blackish, coxfe lighter, clothed with patches of broad, flat, white 

 scales and rows of small dark bristles. 



Abdomen subcylindrical, flattened, the posterior segments tapered; dorsal 

 vestiture black with a few sordid-yellowish scales intermixed, each segment with 

 an ill-defined, broad, basal, subtriangular, laterally interrupted, dull white band 

 and very narrow, rough, apical bands on the distal segments ; seventh segment 

 mostly pale scaled; sides with a row of white, ill-defined, elongate, basal seg- 

 mental patches ; first segment with a patch of white scales and many pale seta3 ; 

 venter largely white scaled, the posterior lateral angles of segments with a black 

 spot, these spots smaller on basal segments. Cerci black. 



Wings broad, hyaline; petiole of second marginal cell shorter than its cell, 

 that of second posterior cell about equal to its cell; basal cross-vein about its 

 own length distant from anterior cross-vein ; scales of the veins very broad, tri- 

 angular, black and white evenly intermixed; outstanding scales comparatively 

 small, lanceolate; fringe unicolorous, blackish. Halteres w^hitish, with a black 

 white-scaled knob. 



Legs moderate ; femora largely white scaled intermixed with black ones which 

 predominate on upper side and towards tip ; knees white ; tibiae black and white 

 scaled, about evenly intermixed, the hind tibise blackish at tip; tarsi white 

 ringed at base, the first joint largely white scaled beneath and with scattered 

 white scales above, the other joints black, with a white basal ring; hind tarsi 

 with the rings rather broad, narrower on the others; last two joints of fore and 

 last joint of middle tarsi entirely black. Claw formula, 1.1-1.1-1.1. 



Length : Body about 5.5 mm. ; wing 5 mm. 



Male. Proboscis rather long, straight. Palpi slightly longer than the pro- 

 boscis, the last two joints thickened, the last broadly club-shaped and flat- 

 tened ; vestiture black, long joint banded with white at middle, a large subapical 

 white spot above and another towards base ; last two joints largely white scaled 

 except at tips; long hairs on last two joints and at end of long joint brown with 

 yellowish luster. Antennas plumose, the last two joints long and slender, black, 

 rugose, pilose, the other joints short, white, brown at the enlarged insertions of 

 the hair-whorls ; hairs of whorls long, dense, brown with yellowish luster. 

 Coloration similar to the female. Wings narrower than in the female, the 

 stems of the fork-cells longer ; vestiture less abundant. Abdomen long, slender, 

 depressed, the segments with broad basal white bands occupying almost half the 

 segments, a few white scales scattered among the apical black ones, the last two 

 segments largely white scaled; lateral ciliation abundant, pale yellowish. Claw 

 formula, 1.1-1.1-1.1. 



Length : Body about 7 mm. ; wing 5 mm. 



Genitalia (plate 27, fig. 188) : Side-pieces over twice as long as wide, rounded 

 at tip ; distal lobe roimded, very prominent, situated subapically, basal lobe quad- 

 rately expanded, with a large spine and many small seta at the base. Clasp- 

 filament long and slender, slightly enlarged medianly, serrate, with three small 

 setae towards tip, a long terminal articulated spine. Harpes elliptical, concave, 

 inner margins thickened and revolute, apex narrowed and terminating in a 

 point which is bent outward. Harpagones with a slender columnar stem slightly 

 curved, with a stout seta near base and a long terminal filament, its basal half 

 slenderly ligulate, outer half triangularly enlarged, almost notched. Unci 

 approximate, revohite, forming a short, broad cylinder with rounded tip. Basal 

 appendages small, bearing several stout setae. 



