AEDES TiENIOKHYNCHUS 669 



black. Clypeus elliptical, prominent, dark brown, nude. Eyes black. Occiput 

 dark brown, broadly clothed with narrow ciirved yellow-brown scales on the 

 vertex, the ocular margins narrowly white-scaled, cheeks clothed with broad 

 flat scales, mostly white, an oblique black patch above on ocular margin, numer- 

 ous upright, black, forked scales on the nape; bristles moderate, dark brown, 

 dense on vertex and projecting between eyes. 



Prothoracic lobes elliptical, remote dorsally, dark brown, clothed with nar- 

 row, curved, bronzy-brown scales and black setae. Mesonotum dark brown, 

 thickly clothed on disk with narrow curved dark golden-brown scales, humeri 

 deep brown scaled, lighter, almost silvery scales over the roots of the wings and 

 about the antescutellar space ; bristles moderate, black ; in some specimens there 

 are present lighter golden brown maculations. Scutellum trilobate, brown, 

 clothed with brassy scales, like those around the antescutellar space, each lobe 

 with a group of brown setae. Postnotum conical, prominent, luteous brown, 

 nude. Pleurae dark brown, coxae luteous, clothed vnth elliptical, flat, white 

 scales and pale setae ; anterior coxae mostly dark scaled. 



Abdomen subcylindrical, flattened, posterior segments tapering, the cerci 

 exserted; dorsal vestiture of dull black scales, each segment with a narrow 

 basal band of sordid yellowish-white scales, a row of lateral, triangular, pure 

 white patches medianly at the sides of the segments, somewhat larger posteriorly, 

 the last two visible from a dorsal view; venter yellow and white scaled inter- 

 mixed with black scales, with subapical black bands, often interrupted at the 

 middle or obsolete. Cerci black. 



Wings moderate, hyaline ; faintly inf uscated ; petiole of second marginal cell 

 shorter than its cell, that of second posterior cell nearly equal to its cell ; basal 

 cross-vein about its own length distant from the anterior cross- vein ; scales of the 

 veins black, the outstanding ones broadly linear, a very slight thickening of the 

 scales at base of third vein. Halteres paJe. 



Legs moderately slender; femora pale beneath, black sealed above and at tip ; 

 knees white ; tibiae black, the stiff outstanding setae pale, under side pale-yellow- 

 ish scaled, a few spots of yellow scales on outer side ; tarsi black, first joint of fore 

 and middle legs with yellowish scales intermixed, each joint of hind tarsi with 

 a rather broad white basal ring, the last joint wholly white; fore and middle 

 tarsi with the white rings narrow, the last two joints wholly black. Claw for- 

 mula, 1.1-1.1-0.0. 



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



Male. — Proboscis straight, long and slender, the white ring narrow and before 

 the middle. Palpi as long as the proboscis, the last two joints slightly enlarged, 

 a broad white ring before middle of long joint and narrower ones at bases of 

 last two joints ; end of long joint and the last two joints with long black hairs. 

 Antennae plumose, the last two joints long and slender, pilose, rugose, black, the 

 others short, brownish, with a narrow black ring at the insertions of the hair- 

 whorls ; hairs long, dense, black with a brownish tint. Coloration similar to the 

 female. Wings narrower than in the female ; stems of fork-cells longer, vesti- 

 ture scanty. Abdomen elongate, depressed, the basal segmental white bands 

 broader than in the female, the lateral spots obsolete on all but the sixth and 

 seventh segments; sides with abundant, long, dull brownish ciliation. Claw 

 formula, 3.1-1.1-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Genitalia (plate 30, fig. 205) : Side-pieces more than twice as long as wide, 

 inner third divided by a slight groove, apical lobe absent, basal lobe small, 

 conically prominent, densely setose. Clasp-filament large, rather strongly 

 swollen medianly, with a long, terminal articulated spine. Harpes concave, 

 elliptical, inner margin thickened and revolute, apex produced into a short stout 



