CTJLEX 8ECTJT0R 285 



Prothoracic lobes elliptical, remote dorsally, clothed with brown setae. Meso- 

 notum blackish, with two dorsal impressed lines showing on anterior half ; vesti- 

 ture of narrow, curved, lustrous, dark bronzy-brown scales, narrowly yellowish 

 along anterior lateral margins, a pair of subdorsal, small yellowish spots ; bristles 

 black, numerous. Scutellum trilobate, blackish, clothed with narrow, curved, 

 pale scales, each lobe with a tuft of blackish bristles. Postnotum elliptical, 

 prominent, brownish, nude, with a median ridge. Pleurae brown, with coxae 

 paler, small patches of narrow white scales, and with rows of small brown 

 bristles. 



Abdomen subcylindrical, depressed, truncated at tip ; dorsal vestiture black, 

 with a few yellowish-white scales centrally on bases of basal segments, a row of 

 lateral, basal, segmental, triangular white spots showing posteriorly from a 

 dorsal view; venter yellowish white, with transverse black bands at apices of 

 segments, a row of yellowish hairs at tips of segments dorsally. 



Wings moderate, hyaline ; petiole of second marginal cell one-half as long as 

 its cell, that of second posterior cell a little shorter than its cell; basal cross- 

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

 the outstanding ones broadly linear, those on forks of second vein densest. 

 Halteres whitish, with brownish tips. 



Legs slender, femora white beneath towards the base ; knees white ; tibiae and 

 tarsi bluish black, the tarsi with very narrow yellowish-white bands at base and 

 apex of each joint, narrower on front tarsi ; tips of tibiae white. Claw formula, 

 0.0-0.0-0.0. 



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



Male. — Proboscis longer than in the female, straight, slightly enlarged to- 

 wards apex, black scaled, a pale ring beyond middle. Palpi exceeding proboscis 

 by more than length of last joint, end of long joint and the last two joints with 

 long, dense, black hairs, long joint with a narrow, pale ring at basal third and 

 a broad ring at the apical third, the last two joints white scaled at base. 

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

 others short, pale, with black rings at insertion of hair-whorls ; hairs long, dense, 

 black. Coloration similar to the female. Wings narrower than iu the female, 

 the stems of the fork-cells a little longer; vestiture sparser. Abdomen with dis- 

 tinct white bands at bases of segments dorsally, narrower posteriorly and ex- 

 panded laterally ; lateral cUiation dense, shorter and coarser than usual. Claw 

 formula, 1.1-1.1-0.0. 



Length : Body about 4.5 mm. ; wing 3.5 mm. 



Genitalia (plate 14, fig. 103) : Side-pieces over twice as long as wide, conicaUy 

 tapered at tip ; marginal appendages on a subapical truncated prominence con- 

 sisting of three rods with hooked tips and a leaf-like appendage and two setae. 

 Clasp-filament stout, rather long, curved, with a small articulated appendage. 

 Harpes furcate, lower branch curved with a rounded tip, outer bearing a dense 

 terminal tuft of spines. Harpagones furcate, outer branch divided into four 

 teeth. 



Larva, Stage IV (plate 107, fig. 360). — Head rounded, widest through eyes; 

 antennae large, a tuft at outer third, the part beyond it slender, pale, base and 

 slender part of shaft brown ; dorsal head-hairs in threes or fours, ante-antennal 

 tufts multiple. Body slightly granular; lateral abdominal hairs in sixes on first 

 segment, in threes on second, in twos on third to sixth ; tracheae broad ; lateral 

 comb of eighth segment of many spines in a large triangular patch. Air-tube 

 six times as long as wide, tapering at outer third; pecten small, extending over 

 basal fourth ; ten tufts in line along posterior border beyond pecten, the last one 

 a double hair. Anal segment longer than wide, ringed by the plate; dorsal tuft 



