276 Orthorrhapha brachycera. 



Male. Vertex aiid frons blue. Epistoma narrow, silver-white, 

 in certain directions dark on the upper half. Palpi dark. Occiput 

 greenish, grey pruinose; postocular bristles black above, pale below. 

 Antennæ black, long, much longer than the head, the third joint 

 twice as long at the two basal, it is of about the same breadth in 

 the whole length, obliquely cut at the apex and somewhat pointed; 

 the thumb-like prolongation of the second joint only present on the 

 inside ; arista subapical, about as long as the third joint ; the first 

 joint has only a single hair above. Thorax æneous or greenish æneous, 

 somewhat bro wnish pruinose, shining; the acrostichal bristles uniserial, 

 posteriorly somewhat biserial. Pleura somewhat greenish, grey pruinose ; 

 metaepimera yellow; propleural hairs pale; scutellum with some hairs 

 at the margin. Abdomen æneous, down the sides more orless yellow; 

 it is clothed with short, black hairs, and has hind marginal bristles, 

 long on the first segment. Venter yellow, with yellow hairs. Legs 

 yellow, front tarsi with the apex of the second joint and the three 

 following joints black ; posterior tibiæ long ; middle tarsi with the first 

 joint long and thin, as long as the four following, the second a little 

 compressed and dilated towards the apex and here black, third and 

 fourth compressed and dilated, and together with the fifth black; 

 hind tibiæ thickened towards the apex and this black; hind tarsi 

 black, or pale at the base, metatarsus a little thickened, as long as 

 the second joint. The legs have short, black or blackish hairs ; coxæ 

 pale-haired, anterior coxæ with some black hairs at the apex, hind 

 coxæ with a black bristle on the outside; middle femora with longish, 

 black bristles below in the basal two thirds, posterior femora with a 

 preapical bristle; front tibiæ with a short, dense ciliation above in 

 the apical two thirds, and generally with a small bristle; middle tibiæ 

 with two anterior and one ventral bristle, and generally also with a 

 dorsal bristle near the base; hind tibiæ with dorsal bristles, and 

 somewhat ciliated above and on the anterior side ; hind tarsi with a 

 short, dense ciliation above, which is brown on metatarsus, white at 

 the apex of metatarsus and on the three following joints; the meta- 

 tarsus has besides two bristles below at the apex, the upper long 

 and curved, the lower short, straight. Wings somewhat greyish or 

 brownish tinged; veins black, the discai vein with a very small bend. 

 Squamulæ yellow with the upper margin dark, and with a brownish 

 fringe. Balteres yellow. 



Female. Epistoma broad, brownish grey, protruding towards the 

 apex. Antennæ short, third joint not longer than broad, arista longer 

 than the antennæ. Legs simple, short-haired, without bristles below 

 middle femora and hind metatarsi, nor with ciliation above these 



