244 [October, 1910. 



half as broad again as long, upper supra-anteniial bristles large and rather 

 inside au alignment witli inner })ristles of middle frontal row, lower ones 

 minvite, antennae red, arista rather short— not twice the length of the 

 frons, palpi pale yellow ; wings and veins yellowish, costa abont ; wing 

 length or rather more ( 9 ), fringe only inodex-ately short, almost bordering 

 iipon longish, 1 aliout i 'as long again as 2 + 8, angle at fork moderate, 

 outer branch of 2nd thick vein angulated, and at the angle 1st thin vein 

 leaves with a small but distinct curve ; legs yellow, tip of hind femora 

 dusky, npper knife-like edge of hind tibiffi deflected outwards a little below 

 the middle, cilia very indistinct ; hypopyginm small and black, with a few 

 hairs but no bristles, ventral plate yellowish, broad and reaching in the 

 quiescent state to about tlie middle of the iinder-side, anal organ of a 

 honey yellow, long and slender and with tlie pair of terminal bristles 

 luiusually small 1 — 1 j mm. lutescens, n. sp. 



51 (TH)) Thorax black. Tibial cilia well developed. 



<J 9 . Thorax and a1>domen black : frons black, about \ broader than long, 

 upper supra-antennal bristles large and moderately approximated, under 

 ones very small, antenna; l)lack with arista of usual length, palpi yellow ; 

 wings yellowish -brown, costa barely i wing length, fringe short, 1 about | 

 longer than 2 + 3, angle at fork moderate, 1st thin vein scarcely curved at 

 its origin opposite the fork ; legs yellow, hind femora stout and blackened 

 at the tip, upper edge of hind tibia; uniformly arched, cilia fairly large 

 and not crowded ; hypopygiiim in the two males before me retracted within 

 the last abdominal segment, leaving in siglit only a stout ytdlow anal 

 organ 1\ mm. nigrescens, n. sp. 



52 (45) Costal fringe long. 



53 (60) Halteres yellow. 

 54! (55) Mcsoplciu-so bristly. 



$ 9 . Thorax and abdomen Ijlack ; frons about ^\ broader than long, 4 large 

 and nearly eqvial supra-antennal bristles, the vipper ones approximated and 

 the under ones close underneath and a little to the inner side of the upper, 

 antenna; rather small, palpi yellow ; wings yellowish-brown, costa f wing 

 length or rather more, fringe remarkably long, 1 distinctly longer than 

 2 + 3 ])ut not quite half as long again, angle at fork moderate, 1st thin 

 vein leaves at the fork with a more distinct curve, especiallj' in female, 

 than usual in these small forms ; legs brown, hind tibiae bare and with a 

 straight upper margin ; hypopygium fairly large, without bristles or con- 

 spiciious hairs, the yelloAvish ventral plate reaches about to middle of 

 under-side, anal organ of modei'ate size, dusky with a yellowish tip... 



% mm. superciliata, n. sp. 



55 (54) 3Iesopleurri; hare. 



56 (57) Male hypopygium conspicuously white. Four large and nearly equal 



supra-antennal bristles. 

 (J 9 . Thorax black, sometimes with a more or less reddish tinge ; abdomen 

 either wholly black or black with the venter yellow, sometimes ( ? ) 

 reddish-brown ; frons black, i broader than long, supra-antennal bristles as 



