PSOROPHORA CILIATA 533 



Abdomen subcylindrical, flattened, strongly tapering posteriorly; rather 

 densely clothed with broad, flat, thin scales, semitransparent, with an iridescent 

 pearly luster, mostly whitish on the disk and along posterior borders of seg- 

 ments, blackish at the sides, the colors not distinctly separated; many short 

 brownish bristles, most prominent at posterior margins of segments; sixth 

 and seventh segments mostly white scaled; venter coarsely white scaled, each 

 segment with an ill-defined median basal spot of black scales. 



Wings large, rather broad, membrane smoky brownish, especially towards 

 costa, veins brownish ; petiole of second marginal cell shorter than its cell, of 

 the second posterior cell slightly longer ; basal cross- vein distant about half its 

 own length from anterior cross-vein ; scales black, very narrowly lanceolate, and 

 ligulate, the outstanding ones longer and narrower. Halteres with pale stems 

 and brown knobs. 



Legs rather long and stout, appearing especially large owing to the numerous 

 erect scales ; femora yellowish, clothed for the most part with small, flat, blackish 

 and yellowish iridescent scales, near tips with a broad band of dense, long and 

 erect black scales ; tibiae brown, clothed with appressed, yellowish iridescent 

 scales at base and beyond with dense, long, erect black scales, which have a slight 

 iridescent luster, densest distally, forming broad black rings ; fore and mid tarsi 

 with first joint whitish scaled except at terminal third where it is black, second 

 Joint white at basal third, the other joints black, their scales not erect; hind 

 tarsi with all the joints broadly white-ringed at the base, remaining portion 

 clothed with dense black scales, erect on first and second joints. Claw formula, 

 1.1-1.1-1.1. 



Length : Body about 9 mm. ; wing 7.5 mm. 



Male. Proboscis straight, clothed with black scales on basal thjee-fifths, 

 outer portion with yellowish-white scales, labellae blackish. Palpi long, thick- 

 ened outwardly, exceeding the proboscis by the length of the last two joints; 

 long joint with a pale anchylosed articulation before the middle, last joint 

 thickened, inflated; vestiture of black scales; outer portion of long joint and 

 the last two joints densely clothed with long black hairs. Antennae plumose, 

 the joints short, except the last two; hairs of whorls very long and dense, 

 blackish brown. Coloration similar to the female. Abdomen long, strongly de- 

 pressed, parallel-sided, with abundant blackish lateral ciliation; a dorsal, 

 median, integumentary yellow line. Wings narrower than in the female, the 

 stems of the fork-cells longer; wing scales less abundant. Claw formula, 

 2.1-2.1-1.1. 



Length : Body about 10 mm. ; wing 7.5 mm. 



Genitalia (plate 20, fig. 143) : Side-pieces rather slender, twice as long as 

 wide, without lobes, uniformly setose; clasp-filament uniformly thickened, 

 arcuate, concavity outward, ending in a sharp angle at outer fourth, a row of 

 short setae within, a moderate terminal articulated spine. Harpes flattened, 

 twisted, tip widely cleft, smooth ; harpagones elongate, columnar, capitate, bear- 

 ing a dense tuft of setae and before the tip a single laminate appendage with a 

 tapered recurved apex; unci moderately approximate, narrowly elliptical, with 

 a recurved subapical inner angle ; basal lobes rudimentarj^ transverse, bearing 

 a few stout setas. 



Larva, Stage IV (see figure of the entire larva, plate 57). Head quadrate, 

 longer than vride, posterior angles rounded, eyes on an irregular prominence, 

 antennas inserted laterally on an angled prominence, front margin shallowly 

 eraarginate. Antennae cylindrical, nearly uniform, sparsely spined all over, a 

 single hair at outer fourth ; four articulated terminal processes and a long spine, 

 twice as long as processes. Eyes large, divided, the larger anterior half pointed. 

 Both pairs of dorsal head-hairs single, approximate ; ante-antennal tuft triple. 

 Mouth-brushes inserted on outer angles of head, folded downward and back- 



