CUIiEX MICKOSQrAMOSTJS 405 



third; tori subspherical, with a cup-shaped apical excavation, brown; hairs of 

 whorls moderate, sparse, black. Clypeus rounded, convex, brown, nude. Eyes 

 black. Occiput brown, clothed with narrow, curved pale-brown scales on vertex, 

 laterally intermixed with dark ones, some white ones along ocular margins, 

 flat white ones well down the sides; many erect, forked black scales dorsally, 

 forming a dense patch on each side ; a row of black bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, brown, with a few pale scales and 

 black bristles. Mesonotum brown, with two impressed bare lines, clothed with 

 small, short, narrow, curved bronzy brown scales, intermixed with larger black 

 ones. Scutellum trilobate, luteous, with small bronzy scales, a few hair-like 

 black scales on the mid lobe, each lobe with a group of black bristles. Post- 

 notum elliptical, prominent, luteous, nude. PleurjE and coxse pale greenish, 

 with small patches of flat white scales and rows of brown bristles. 



Abdomen subcylindrical, truncate at tip ; dorsal vestiture black, a row of pale 

 bristles at posterior margins of segments, a row of lateral, basal, segmental, tri- 

 angular, white patches, which on fifth, sixth, and seventh segments extend more 

 or less onto the dorsum, tending to form transverse bands; eighth segment pale 

 sealed with a dark apical spot; venter whitish scaled. 



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

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

 than its own length distant from anterior cross- vein ; scales of veins brown, black 

 on costa, outstanding ones near tip of wing, long, linear, denser on forks of 

 second, third and fourth veins. Halteres whitish, with a dark knob. 



Legs moderate, black scaled with a bronzy and bluish reflection; femora 

 whitish beneath to tips; tibiae with a pale-bronzy shade beneath, the tips 

 whitish. Claw formula, 0.0-0.0-0.0. 



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



Male. — Proboscis straight, apical two-thirds thickened, vestiture blackish, 

 paler beneath, with a lighter shade in the middle. Palpi exceeding the proboscis 

 by nearly the length of the last two joints, which, with end of long joint, are 

 thickened and densely hairy; vestiture black, a narrow pale whitish ring at 

 basal third of long joint. Antennae plumose, the last two joints long and 

 slender, rugose, pilose, black, the others short, whitish, with black rings at in- 

 sertions of hair- whorls; hairs long, dense, black. Coloration similar to the 

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

 vestiture sparse. Abdomen long, slender basally, expanded towards apex; 

 dorsum with basal, segmental dull white bands, laterally expanded on the 

 seventh segment, the eighth with white lateral triangular spots ; lateral ciliation 

 rather abimdant, of coarse brown hairs. Claw formula, 1.1-1.1-0.0. 



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



Genitalia (plate 16, fig. 116) : Side-pieces twice as long as wide, conically 

 tapered at tip, a quadrate prominence beyond the middle bearing three rods with 

 hooked tips, a leaf -like appendage and a seta. Clasp-filament moderate, uniform 

 with an articulated terminal spine. Harpes with an inner ligulate arm bearing 

 a tuft of spines at tip, outer branch smooth, curved. Harpagones divided into 

 plates strongly dentate on inner side. Basal appendages remote, setose. 



Larva, Stage IV (plate 100, fig. 330). — Head broad, rounded, widest through 

 eyes. Antennae long, rather slender, a large tuft at outer third, the part beyond 

 it slender, shaft spinose. Both pairs of dorsal head-hairs in threes, the ante- 

 antennal tuft multiple. Body with the skin glabrous ; lateral abdominal hairs 

 in twos on third to sixth segments. Lateral comb of eighth segment of many 

 spines in a large triangular patch. Air-tube straight, tapering very gradually, 

 about eight times as long as wide, pecten of short teeth and along basal 

 fourth ; four tufts well beyond pecten, subapical one removed laterad out of line. 



