CTJLEX KESTUAN8 



^^ 



ante-scutellar space, and a pair of round spots behind the lateral depressions. 

 Scutellum trilobate, brown, clothed with narrow, curved pale-yellow scales, each 

 lobe with a tuft of black bristles. Postnotxun elliptical, prominent, brown, nude. 

 Pleurse and coxeb yellowish brown, with patches of elliptical, flat white scales 

 and rows of brown bristles. * 



Abdomen subcylindrical, truncated at tip ; dorsal vestiture black with bluish 

 reflection, a moderately broad yellowish-white band at base of each segment 

 except the first, widening on sides on sixth and seventh segments, the one on 

 second segment mesially produced, last segment mostly pale scaled ; venter yel- 

 lowish-white sealed, a narrow black band at tip of each segment; sides and venter 

 with long coarse yellowish hairs. 



Wings ample, hyaline ; petiole of second marginal cell about one-sixth as long 

 as its cell, that of second posterior cell shorter than its cell ; basal cross- vein more 

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

 costa, the outstanding ones long and linear. Halteres whitish with darker knobs. 



Legs moderate, slender ; femora white at base and beneath nearly to tips ; 

 vestiture otherwise black with a bronzy and blue reflection above and brassy 

 beneath ; knees narrowly whitish ; hind tarsal joints more or less distinct and 

 narrowly pale brown at bases and tips. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 4.5 mm. 



Male. — Proboscis long and straight, gradually enlarged towards apex. Palpi 

 exceeding the proboscis by nearly the length of the last two joints, which with 

 outer third of long joint bear many black hairs ; vestiture bronzy black, a nar- 

 row white ring at basal third of long joint, last two joints with a patch of white 

 scales at base beneath and a line of white scales along ventral surfaces of these 

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

 black, the others short, whitish, ringed with black at insertions of hair-whorls ; 

 hairs long, brown. Coloration similar to the female. Wings narrower than in 

 the female, the stems of the fork-cells longer ; vestiture sparser. Abdomen long, 

 depressed ; dorsum with broad basal whitish bands, those on sixth and seventh 

 segments laterally expanded, eighth segment nearly all white scaled; lateral 

 ciliation abundant, long, pale. Claw formula, 1.1—1.1-0.0. 



Length : Body about 5 mm. ; wing 4 mm. 



Genitalia (plate 17, fig. 134) : Side-pieces more than twice as long as wide, 

 tapered outwardly; marginal appendages on a truncated subapical prominence 

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

 Clasp-filament large, stout, tapering outwardly, with a small articulated 

 terminal appendage. Harpes furcate, the outer branch curved, simple, the 

 inner bearing large tufts of spines. Harpagones divided into four plates, the 

 third one with a long tooth projecting laterally. Basal appendages short, 

 rounded, remote, setose. 



Larva, Stage IV (see figure of the entire larva, plate 53). — Head small, 

 rather square, but not broadly transverse, sides convex at eyes, hind angles blunt, 

 a notch at insertion of antennae, front mai^n arcuate. Antennae moderate, a 

 rather small tuft near the middle, portion beyond tuft slightly narrower than 

 basal part, all densely spined ; four small terminal setae and a digit on a pedestal. 

 Both pairs of dorsal head-tufts and ante-antennal tufts multiple. Mental 

 plate quadrate, sides long and straight ; an apical tooth and eleven on each side, 

 followed by four teeth on long sides. Mandible quadrangular, two filaments 

 outwardly with two small filaments and two hairs arising from their bases ; an 

 outer row of cilia from a collar ; outer edge with a row of short teeth ; dentition 

 of four teeth on a process, first longest ; a serrate filament and row of feathered 

 hairs within; process below cleft furcate with patches of hair; angle below mod- 



