26 [February, 



(? 9 . Very like ciJiafa, froni which it only differs in the colour of the halteres 

 the more deeply tinged wings and sliorter costa, which j^lacrs tlie J almost in 

 Section D, the rather longer fringe, and the absence of anv shortening of the 

 fourth abdominal segment in the $ ; it is also a smaller insect... 



1 — 1\ ram. requalis, n. ftp. 



14 (13) Legs yell 010. Costa ivell betiond the middle. 



S ? . Tliorax and abdomen black, postalar calH in both sexes broadly yellow or 

 red, humeri and pleurpe more or less ijlainly so in ? , meso-pleura; wilh one 

 bristle much longer than the rest ; frons grey, about as broad as long, upper 

 pair of supra-antennal bristles rather small, under pair minute, antennre orange, 

 palpi pale yellow ; wings yellowish, veins yellowish-brown, I shorter tlian 2 ; 

 legs yellow, hind femora dilated, ciliated beneath with longisli hairs, and witliont 

 a dark spot at the apex, tibial cilia large and sparse ; second abdominal segment 

 bristly as in ruficornis, third segment (9) lengthened at the sides, fourth much 

 abbreviated and encroached upon laterally by preceding segment, ovipositor 

 large and exserted : the sub-anal body is yellowish, and so is the small and 

 simple ventral process, anal organ large and clear yellow... 



1| — 2 mm. fJaiie.^cenx, n. .<:p. 



15 (2) Mesopleurx bare. 



16 (29) Halteres hlacTc. 



17 (22) Frons dull or scarcely shining. 



18 (21) Legs llach. 



19 (20) Costa well hey ond middle of toing. 



$ 9 • Thorax and abdomen deep black ; frons rather broader than long, black, and 

 with just the suspicion of a gloss, four moderate and nearly equal supra-antennal 

 bristles, arista unusually long, palpi yellow ; wings grey, costa and veins brown, 

 costa well beyond middle of wing, 1 rather longer than 2, and shorter than 2 + 3, 

 first thin vein slightly recurved at margin ; fore tarsi rather stout, hind femora 

 dilated, tibial cilia fairly long, especially the tliree or four central ones ; hypo- 

 pygium large, sub-anal body usually concealed, the black ventral process, slender 

 and forked, always visible, anal organ very long and depressed, yellowish with a 

 black base 1 — 15 mm. longiseta, n. sp. 



20 (19) Costa sliort of middle of wing. 



(J 9 • ^ deep black species : — Thorax and abdomen black ; frons a dull black, about 

 half as broad again as long, supra-antennal bristles of moderate size and nearly 

 equal, antennae fairly large and arista not lengthened, palpi black ; wings 

 greyish and veins black, cilia very short, costa distinctly short (<?), and barely 

 reaching middle of wing ( 9 ), 1 twice as long as 2; all the legs black, tibial 

 cilia more numerous and smaller than in longiseta, but the central one, as in 

 that species, distinctly the longest ; hypopygium (a single $) concealed, showing 

 only a small, black, and upturned anal organ J — 1 mm. rivalis, n. sp. 



21 (18) Legs yellow, at the most smirched sometimes toith grey. A small, almost 



tiny, species. 

 (J 9 • Thorax and abdomen black, a tendency to yellow about the humeri and 

 pleuroD ; frons rather broader than long, four small and nearly equal supra- 

 antennal bristles, the under pair close to the middle line, antennte very small, 



