88 Orthorrhapha brachycera. 



black prothoracic bristle. Abdomen bronze-coloured, at the sides a 

 little greenish, and here whitish pruinose; the hind margins of the 

 segments dark; abdomen is clothed with short, black hairs, the hind- 

 marginal bristles not long, increasing in length behind. Venter greyish, 

 slightly pale-haired. Hypopygium somewhat large, black, a little 

 æneous on the right side, greyish pruinose; the eighth segment with 

 black hairs; there are slightly projecting posterior ventral lobes with 

 a little styliform point at the apex; the inner lamellæ short, curved 

 downwards, the lateral dilated; the outer lamellæ of moderate size, 

 somewhat ovate, whitish with a somewhat broad, blackish margin, 

 narrower on the dorsal side; at the end there is a couple of teeth 

 with black, curved hairs; the first tooth is placed somewhat dorsally; 

 the ventral margin has short, dense hairs, and longer, inwards curved 

 hairs; the outside of the lamellæ is short and densely pale-haired. 

 Legs black, coxæ grey, on the anterior side whitish grey pruinose; 

 anterior metatarsi except apex obscurely yellowish or brownish, the 

 middle metatarsi lightest. The legs have short, black hairs, the 

 anterior coxæ chiefly white-haired ; hind femora with longish hairs 

 above at the base, short, pale hairs below, and here with a fringe 

 of long, black hairs in the whole length; posterior femora with one 

 preapical bristle; front tibiæ with rows of bristles dorsally* and with 

 one posterior bristle above the middle ; middle tibiæ with about four 

 antero-dorsal, two dorsal or postero-dorsal bristles and one ventral 

 below the middle; hind tibiæ with two dorsal rows of very long 

 bristles, longest in the postero-dorsal row and many bristles in each 

 row, and with a ventral row of likewise long bristles; hind metatarsi 

 also with many bristles above and on the anterior side, and with 

 small bristles below. Wings slightly brownish tinged, most towards 

 the anterior margin; veins black, costa with a somewhat long swel- 

 hng; discai vein with a small, obtuse, but slightly angular bend; axil- 

 lary lobe small, anal vein stretching far forwards. Squamulæ yellow, 

 with a yellow fringe. Halteres yellow. 



Female. Epistoma broad, whitish grey. Antennæ about as in 

 the male. Coxæ more black-haired; hind femora with shortish, dark 

 hairs below, and without fringe; hind tibiæ with the bristles a little 

 shorter, and hind metatarsi with only two bristles above. Wings 

 more brownish tinged; costa without swelling. The fringe on the 

 squamulæ with a couple of black hairs intermingled. 



Length 3,5 to about 4 mm. 



This interesting species is obviously D. tanythnx Loew, but it 

 differs in one character, viz. the yellow-fringed squamulæ; only in 

 the female there are a few black hairs; but this difference is, I think, 



