IC)Q [August, 1910 



36 (37) A large species (2 mm.). Cilia on hind tibiae well developed. 



S ? . Thorax and abdomen black ; frons scarcely shining, a trifle broader tliau 

 long, 4 large and nearly eqvial siipra-antennal bristles, the upper ones 

 outside an alignment with inner bristles of middle frontal row, the under 

 closely approximated, inner bristles of lower frontal row much below and 

 a little to the inner side of the outer ones, antenna? of average size, palpi 

 large and deep yellow ; wings pale yellowish-brown, costa barely f wing 

 length ( J ) about f ( ? ) , fringe moderately long, 1 more than double 2 + 3, 

 angle at fork small especially in ? , first thin vein in ? slightly cui-ved at 

 its origin from the fork ; legs yellowish-brown, tibial cilia sparse and 

 strong; male abdomen stout, hypopygitun small, without bristles, the 

 yellowish ventral plate broad and reaching in the quiescent state to the 

 middle of the under-side, subanal body invariably concealed, the yellow 

 anal organ sliort and stout, filling the posterior outlet of the hypopygium . . . 



2 mm. maura, n. sp. 



37 (30) A small species (under 1 mm.). Hind tibiae quite bare. 



cj . Described from a single specimen : — Thorax and abdomen black ; frons 

 black and slightly shining, being somewhat bent in down the centre its 

 characters are rather obscured, but it is certainly broad, the upper supra- 

 antennal bristles in alignment with inner bristles of middle frontal row 

 and the under ones closely approximated, inner bristles of lower frontal 

 row well below the level of outer ones, antennae rather small, palpi small 

 and dtisky yellow ; wings nearly clear, thin veins fine and delicate, costa 

 not |- wing length, fringe moderately long, 1 not moi'e than half as long- 

 again as 2 + 3, angle at fork large ; legs blackish-brown, hind femora stout 

 and angulated in the middle of the rmder-side, hind tibiae gradually and 

 distinctly tliickened in their lower half, and fringed about the middle of 

 their inner side with a few short and erect hairs ; hypopygium large, equal 

 in length as well as in its other dimensions to the last abdominal segment, 

 thickly fringed below vvith fine and short hairs, ventral plate small, anal 

 organ minute and yellow f mm. erecta, u. sp. 



38 (35) Hypopygium with a pair of consxncuous bristles on each side. 



S 9 ■ Thorax and abdomen black, the former sometunes obscurely reddish ; 

 frons about 3 broader than long, upper supra-antennal bristles of average 

 size and fairly appi-oximate, under ones very mucli smaller and often not 

 in view, antenna; black or brown, rarely red, palpi pale yellow ; wings 

 deeply tinged with yellowish-brown, costa less than | wing length, fringe 

 only moderately long, 1 more than double 2 + 3, 2nd thick vein somewhat 

 incrassated in both sexes and its outer branch turucid up abruptly to the 

 costa, angle at fork moderate, 1st thin vein reciu'ved at the margin ; legs 

 yellow, hind femora darkened at the tip and the basal half of its under- 

 side loosely fringed with longish haii-s, tibial cilia weak ; hypopygium of 

 ordinary form and size, almost bare of hairs, and the pair of bristles on 

 each side so close together as often to appear but as a single bristle, the 

 yellow ventral plate broad and reaching only a short way along the under- 

 side, anal organ yellow, short and stout 1^ — 1^ mm. halterata, n. sp. 



