AEDE8 PTJLLATUS 739 



pair of shorter dark stripes posteriorly at sides of antescutellar space ; a median 

 linear stripe devoid of scales and varying in distinctness ; submedian stripes long 

 but not reaching anterior margin, sublateral pair short, confined to posterior 

 half; bristles numerous, moderate, black. Scutellum trilobate, black, clothed 

 with pale-yellow scales, each lobe with a group of long brown bristles. Post- 

 notum elliptical, prominent, black, slightly pruinose. Pleuraa and coxae black, 

 clothed with narrow curved yellowish scales above and elliptical, flat, white scales 

 below, and rows of pale bristles. 



Abdomen subcylindrical, flattened, tapering posteriorly; dorsal vestiture of 

 bluish-black scales, each segment with a narrow basal white band which widens 

 somewhat laterally, the first segment with white scales and many pale setae; 

 venter yellowish-white scaled, with segmental brown-black patches at apical 

 angles, in some specimens extended to complete transverse bands. Cerci black. 



Wings rather narrow, hyaline ; petiole of second marginal cell a little shorter 

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

 vein about its own length distant from anterior cross- vein ; scales deep brown, 

 black on costa, except a small patch at base below the costal vein, which is white ; 

 outstanding scales broadly linear, deep brown. Halteres whitish. 



Legs slender and rather long; femora largely black scaled above, yellowish- 

 white below to near apex, extreme tips white ; tibiae with deep brown and yellow- 

 ish-white scales intermixed, the pale scales predominating on under side ; tarsi 

 deep brown scaled, the proximal joints largely pale scaled beneath and the black 

 scales increasing outwardly, the terminal joint wholly black. Claw formula, 

 1.1-1.1-1.1. 



Length : Body about 5.5 mm. ; wing 5 mm. 



Male. — Proboscis straight, long and slender, bronzy-black scaled. Palpi 

 nearly as long as proboscis, the apex of long joint and the last two joints slightly 

 enlarged; vestiture bronzy-black, long hairs at end of long joint and on last 

 two joints abundant and black. Antennae plumose, the last two joints long, 

 slender, rugose, pilose, black, the others short, entirely blackish ; hairs of whorls 

 long, black. Coloration similar to the female. Abdomen elongate, depressed, 

 with coarse and long brown lateral ciliation ; segmental white bands of dorsum 

 much produced posteriorly on lateral margins; ventral black bands medianly 

 triangularly produced. Wings much narrower than in the female, the stalks of 

 the fork-cells longer, the vestiture sparse. Claw formula, 1.1-1.1-1.1. 



Length : Body about 6 mm. ; wing- 5 mm. 



Genitalia (plate 36, fig. 182) ; Side-pieces three times as long as wide, tip 

 rounded; apical lobe broadly prominent, continued very broadly to the base, 

 where a slight expansion indicates the basal lobe. Clasp-filament slender, 

 slightly expanded medianly, with a moderate articulated terminal spine. Harpes 

 concave, curved, thickened at tip and slightly cleft. Harpagones with a long 

 columnar base angled in middle, the outer half arising from the inner at the 

 bend, which is rounded over and setose, a terminal, rather short, articulated fila- 

 ment with rounded lateral expansion. IJnci approximate, revolute, forming 

 a short, broad, basal cylinder. Basal appendages remote, short, bearing several 

 stout spines. 



Larva, Stage IV (plate 117, fig. 402) . — Head rounded, narrowed before eyes, 

 a notch at insertion of antennae, front margin broadly arcuate. Antennae 

 moderate, subcylindrical, slender, spined all over ; tuft moderate, a little before 

 middle ; four irregular apical spines and a short process. Eyes large, transverse, 

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

 Mental plate triangular, with a central tooth and ten on each side, the basal ones 

 more remote, the last two small and well separated. Mandible quadrangular, a 

 group of short spines at base; two filaments before tip; an outer row of cilia 



