IIG [May, 



57 (56) First costal division at least half as long again as the second ; fringe only 



moderately long. 

 cJ ? . Thorax and abdomen black, pleurae with one bristle much longer than the 

 others ; frons black, about j broader than long, supra-antennal bristles only 

 moderately large the under ones not more than half the size of the upper, 

 palpi yellow ; wings usually tinged with yellowish-brown ( $ ) nearly clear 

 ($),costato middle of wing ((J) rather beyond ( ? ), 1 twice as long as 2 

 ((?) only half as long again (?), angle at fork moderate, 1st thin vein as in 

 beckeri ; legs yellow more or less smirched with grey, middle and hind femora 

 blackened along upper and lower borders, especially in male, lower side of 

 (J hind femora projecting in the middle as in humilis and clothed on the basal 

 half with numerous small and soft hairs, tibial cilia weak ; hyi)opygium large 

 and knob-like with a long and slender bristle at each lower corner, subanal 

 body when exposed very long and complex, the black and (as seen in profile) 

 curved ventral plate long and narrow, anal organ large and yellow... 



1^ — 2 mm. fungivora, n, sp. 



58 (49) Halteres yellow. 



59 (60) Costa distinctly short of tuing middle, at least in the male. 



S ? . Thorax and abdomen deep black, 1 very long and conspicuous pleural bristle 

 besides smaller ones ; frons about \ broader than long, 4 large and nearly 

 equal supra-antennal bristles, palpi clear yellow and of good size ; wings whitish 

 and veins fine and dark, costa almost short enough for Section D {$) but 

 nearly reaches wing middle ( ? ), I as long as 2 ((J) longer than 2 and about 

 equal to 2-f3 ( ? ), angle at fork rather small, 1st thin vein very gently curved 

 at its origin {S) modei-ately curved ( ? ) ; legs black, tibial cilia moderate but 

 sparse and distinct ; male abdomen stout, hypopygium small with 1 or 2 short 

 bristles at the lower corners, subanal body when exposed small, ventral plate 

 pale yellow, large and flap-like, anal organ small and yellow... 



1^ — If mm. alhipennis, n. sp. 



60 (59) Costa barely short of iving middle, generally beyond it. 



61 (62) Hind femora of male densely fringed on the basal half of loioer side with 



long hairs. First thin vein very sharply curved at its origin in the 

 female. 

 (J ? . Thorax and abdomen black, the latter with a greyish hue, pleural bristles 

 simple ; (J frons very low, nearly twice as broad as long and strongly grey in 

 some lights, ? narrower and less distinctly grey, 4 supra-antennal bristles, the 

 under pair, especially in female, somewhat smaller than the upper, antennse 

 rather large, palpi yellow ; wings nearly clear, costa and fringe both very long, 

 veins black, 1 not longer than 2 ( <? ) but usually rather longer ( $ ), angle at 

 fork moderate, Ist thin vein sharply curved at its origin, especially in female ; 

 legs dark brown, terminal joint of front tarsi black in both sexes and in male 

 dilated, tibial cilia distinct but not large ; hypopygium, though short, large and 

 massive, shining black and densely fringed on the posterior edge with very long 

 and overhanging hairs, a large yellow and flap-like ventral plate, and a small 

 yellow anal organ 2^ mm. sordida, Ztt. 



