AEDE8 WALKEEI 851 



fine pale hairs ; venter silvery-white scaled, the posterior segments banded with 

 black at the apices. 



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

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

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

 outstanding ones narrowly ligulate. Halteres whitish, with dark knobs. 



Legs slender, moderately long; vestiture black, marked with silvery-white; 

 femora broadly white beneath except towards tip on fore and mid legs ; knees 

 narrowly silvery-white ; tibise entirely black ; hind tarsi with a broad white ring 

 at bases of first three joints, the last two entirely dark; fore and middle tarsi 

 with only the first joint narrowly white at base. Claw formula, 0.0-0.0-0.0. 



Length: Body about 3.5 mm.; wing 3.8 mm. 



Male. — Proboscis long and slender, nearly straight, black sealed. Palpi as 

 long as the proboscis, slender, the terminal joints not enlarged and with a few 

 long bristles only; vestiture bronzy-black, the last two joints with a patch of 

 silvery-white scales basally beneath. Antennae plumose, the last two joints long 

 and slender, rugose, pilose, black, the others short, pale, ringed with black at in- 

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

 the female. Abdomen elongate, depressed, the lateral ciliation coarse, short and 

 rather sparse. Wings nearly as broad as in the female, the scales less abundant. 

 Claw formula, 2.1-3.1-0.0. 



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



Genitalia (plate 33, fig. 333) : Side-pieces about twice as long as wide, tips 

 conically tapered ; apical lobe absent, basal lobe broadly conical, bearing a single 

 stout terminal seta. Clasp-filament moderate, slightly enlarged at base, with a 

 long articulated terminal spine. Harpes elliptical, inner margins and the tip 

 broadly thickened and revolute, narrow at end and bent over, a few small setae 

 on outer aspect. Harpagones wanting. Unci approximate, revolute, forming 

 a stout basal cylinder. Basal appendages absent, represented by a group of four 

 stout setae on either side. 



Larva, Stage IV (plate 135, fig. 433). — Head rounded, slightly wider than 

 long, narrowed at insertion of antennse. Antennae cylindrical, rather slender, 

 very slightly tapered, sparsely spined all over ; a single hair a little beyond the 

 middle ; three moderate and one long terminal spine and a digit on a pedestal. 

 Eyes moderate, transverse. Upper pair of dorsal head-hairs single and long, 

 lower pair shorter, of four hairs; ante-antennal tuft multiple. Mental plate 

 triangular, large, a central sharp tooth and eleven on each side, alike, closely 

 set, their tips inclined inward. Mandible quadrangular, a group of small spines 

 vrlthout; two stout filaments near tip, each with a spine at base ; an outer row of 

 coarse cilia from a well-defined collar; another row on outer margin ; dentition 

 of one large and three small teeth on a narrow process; two small filaments 

 above, a serrate filament and four plumose ones within; process below furcate, 

 with a row of hairs above and a tuft at tip of each limb ; five stout hairs within ; 

 five long hairs at base. Maxilla nearly hemispherical, bisected by a band-shaped 

 suture ; inner half densely haired ; a brush of hairs at tip, two long processes 

 near the suture and a spine on the other side ; palpus narrowly joined to body 

 of maxilla, about four times as long as wide, with small spines before the tip 

 and four terminal digits, two of which are on an elevated base. Thorax rounded, 

 wider than long; hairs moderate. Abdomen moderate, the anterior segments 

 shorter; lateral hairs of first two segments in tufts of three, double on third to 

 fifth, single on sixth; short hairs in large stellate tufts on both thorax and 

 abdomen. Thorax smooth, abdomen densely and coarsely pubescent. Air-tube 

 moderately stout, about two and a half times as long as vride, slightly tapered ; 



