56 



stiff outstanding seta? mostly black; tarsi black, each joint of hind legs with a broad 

 basal ring of white scales; the first joint with many white scales scattered over the 

 surface and tending to form lines; on the front and middle tarsi, the basal bands 

 are narrow and nearly obsolete on the last joints. Claw formula l'l — 11 — l'l. 



Length: Body about 6 mm, wing 4,5 mm. 



Male: Proboscis slender, straight. Palpi exceeding the proboscis by about the 

 length of the last joint; end of long joint and the last two joints somewhat thickened 

 and bearing many long dark-brown hairs; long joint clothed with black scales and 

 white ones intermixed, a broad white ring at middle and near base; last two joints 

 with many white scales at their bases. Antenna' plumose, the last two joints long 

 and slender, black, rugose, pilose, the others short, largely pale; hairs of whorls 

 long, dense, black, with yellowish brown bristles. Coloration similar to the female. 

 Wings narrower than in the female, the stems of the fork-cells longer, vestiture 

 sparse. Abdomen long depressed, the basal bands broader, lateral ciliation long and 

 abundant, pale yellow. Claw formula l'l — l'l — 11. 



Length: Body about 6 mm. 



Genitalia. Side pieces over twice as long as wide, slender, distal lobe roun- 

 dedly prominent, continued along the inner margin, narrowly to the basal lobe; 

 basal lobe quadrately expanded, bearing many small seta? with tubercular bases, 

 but without a stout spine. Clasp-filament slender, bearing a few small seta? out- 

 wardly, at the tip a long articulated terminal spine. Harpes slender, concave, the 

 inner margins revolute, hooked at the tip, the point directed outward. Harpagones 

 with a slender cylindrical base, curved, minutely pilose, bearing a terminal filament 

 which is nearly as long as the stem and angularly expanded at middle. Unci ap- 

 proximate, revolute, forming an indistinct basal cylinder. Basal appendages stout 

 and approximate bearing a row of stout seta? at the tip. (After H. D. K.). 



Larva: Head rounded, wider than long; restricted before the eyes; a notch 

 at insertion of antenna; front margin broadly arcuate. Antenna short, attenuated 

 at apex, tuft small, only consisting of a few, about six or seven, hairs inserted 

 almost in the middle of the antenna; spinose; the spines remarkably long and with 

 a fine serration along inner edge. Near the apex two long spines, and at the apex 

 three short ones and a digit. Anteantennal tuft multiple, lower frontal tuft with 

 three or four hairs, upper double. Eyes large. Thorax rounded, wider than long, 

 angled at hair-tufts. Hair formula of frontal border 221113311122 or 231213312132. 

 The median tuft three, with one long hair and two very short, tuft 1 after the 

 median tuft three, also very short. Lateral hairs in multiple tufts and single strong 

 hairs. Abdomen rather broad, the first segments much shorter than the following. 

 Lateral hairs of the first segment triple, on the second to the seventh double, eighth 

 segment with tufts in common arrangement. Lateral comb consisting of about 

 thirty-forty scales, arranged in rows, covering a triangular area; the scales spatulat- 

 ed at base, ending in a very strong spine and furnished with rather long spines at 

 the borders of the spatulated part. Sipho about four times longer than broad, 



