CULISETA MACCEACKENJE 495 



bare stripes at anterior margin, a pair of narrow bare stripes on posterior half, 

 one on either side of anteseutellar space midway towards lateral margin; the 

 golden scales occupying a broad median stripe on anterior two-thirds, still 

 larger whitish scales along anterior and lateral margins, broadly about ante- 

 seutellar space and in lines on inner sides of posterior bare stripes, some irregu- 

 lar patches of pale scales sublaterally. Scutellum trilobate, densely whitish 

 sealed, each lobe with a group of long black setse. Postnotum nude, shining, 

 brown. Pleurae and coxas brown, with patches of white scales and brown setse. 



Abdomen subcylindrical, truncate at tip; dorsal vestiture dull black, with 

 rather narrow, basal, segmental white bands, slightly mesially produced on 

 anterior segments ; first segment with a patch of whitish scales and many pale 

 hairs; last segment entirely white sealed; venter white scaled, the segments with 

 diffused V-shaped markings of black scales, their points directed anteriorly. 



Wings ample, hyaline, with diffused smoky spots at base of second vein, upon 

 cross-veins and at bases of fork-cells; scales of veins dark brown, a few white 

 ones intermixed along costa ; all the scales on the veins narrow, the outstanding 

 one much longer, scaling more dense on first vein, forks of second and fourth 

 veins, at cross-veins, base of second vein, base and apex of third vein and outer 

 half of sixth vein, producing the effect of spots at the bases of the fork-cells, 

 at the cross- veins, at base of second vein and apices of third and sixth veins; 

 basal cross-vein separated by much less than its own length from anterior 

 cross-vein, the cross-veins with scales on the outer side; second marginal cell 

 nearly twice as long as its stem ; second posterior cell longer than its stem, and 

 further from the base than the second marginal cell. Halteres pale, with black 

 knobs. 



Legs slender, rather long ; vestiture black and white ; femora black, white on 

 the inner side except narrowly at base and tip, a broad, irregular, white, sub- 

 apical ring; femora and tibiae yellowish white tipped; mid tibiae with a white 

 line on inner side, front ones with a white line without; tarsal joints white 

 ringed at their bases, broadly so on the hind legs, fore and mid tarsi without 

 white ring on fifth joint; hind tarsi with traces of an outer longitudinal line 

 on first two joints. Claw formula, 0.0-0.0-0.0. 



Length : Body about 6 mm. ; wing 6.5 mm. 



Male. — Proboscis straight, long and slender, vestiture black mixed with light 

 gray, under surface nearly all pale scaled. Palpi long and slender, slightly 

 exceeding the proboscis, apex of long joint and penultimate joint thickened, 

 last joint club-shaped; apex of long joint and last two joints with long dense 

 black hairs, paler where the scaling is pale; vestiture of dark scales with a 

 lustrous reflection, a white ring at base and middle of long joint and bases of the 

 two distal joints. Antennae plumose; last two joints long and slender, the 

 others short, white, with thick black rings at the insertions of hair-whorls ; hairs 

 of whorls very long, blackish, moderately dense; tori large, pale ferruginous, 

 pruinose. Coloration similar to the female. Occiput with the erect, forked 

 scales, as well as the recumbent ones, whitish. Abdomen with the pale basal 

 bands broader than in the female, last segment entirely white scaled above; 

 lateral cUiation abundant, luteous. Wings narrow, less heavily scaled and less 

 distinctly spotted than in the female, angulate base of third vein and the two 

 cross-veins incident. Tarsal claw formula, 3.1-2.1-0.0. 



Length: Body about 6.5 mm.; wing 5.5 mm. 



Genitalia (plate 35, fig. 334) : Side-pieces over twice as long as wide, stout, 

 rounded at tips, a small subapical lobe bearing setae and a larger, stoutly conical 

 basal one bearing three stout spines ; clasp-filament slender, rather small, uni- 

 form, with a small articulated terminal spine. Harpes columnar, with recurved 

 divided tips; harpagones small, slender, rod-shaped, rounded at tip; unci 



