134 Orthorrhapha brachycera. 



white. Labrum about twice as long as the head is high, palpi yellow 

 with short hairs. Antennæ as long as the head, black, the first joint 

 twice as long as the second, the two first joints with short hairs. 

 Thorax yellowish brown, with three narrow, velvet black stripes, 

 abbreviated behind, the two lateral also in front; the humeri with 

 a rufous point. The dorsocentral bristles uniserial, longer and strong 

 behind, the acrostichal bristles shorter, biserial; all black. Further a 

 hnmeral bristle, a posthumeral, three notopleural, a supraalar and a 

 postalar bristle, all black; besides there are sonie bristly hairs on the 

 humeri and around the posthumeral bristle, and some small hairs in 

 the anterior part of the præsutural depression. Scutellum has a broad, 

 yellow margin and four black bristles. Pleura greyish brown, meta- 

 pleura with black bristles and some thin, yellow hairs; propleura 

 with yellowish hairs; the spiracles brownish yellow. Abdomen brownish 

 yellow, slightly shining, sometimes showing some ill-defined dark 

 spots; it is clothed with short, black hairs, at the hind margins of 

 the segments there are longer, black bristles. Venter similarly coloured 

 and haired; towards the anterior margin of the first ventral segment 

 there is in the middle an impression with longish hairs, but it is 

 difficult to see in dried specimens. Exterior genitalia rather small, 

 and in so far of a curious construction, as the upper lamellæ are 

 much larger than the lower; each of the upper lamellæ is almost 

 semiglobular, the two lamellæ together forming a globular knob; they 

 have two small incisions in the hind margin between which a median 

 tooth is formed; the lower lamellæ are small, much shorter than the 

 upper, triangular and pointed. Penis is strongly curved, but generally 

 hidden between the lamellæ, sometimes a little protruding above. 

 The lower lamellæ and the eighth ventral segment have somewhat 

 long, black hairs. Legs yellow, the very apex of the tibiæ and the 

 tarsi except the base blackish; coxæ very slightly greyish pruinose. 

 Femora chiefly short-haired, the hind femora with longer hairs to- 

 wards the base, and short, bristly hairs below; the middle tibiæ with 

 a dorsal and two ventral rows of strong bristles; hind tibiæ with 

 two dorsal rows of bristles; besides the front and hind tibiæ finely 

 cihated below; the tarsi with somewhat numerous bristles, especially 

 below. Wings somewhat brownish tinged. Veins dark brown, the 

 lower branch of the cubital fork bending downwards and slightly re- 

 curved towards the apex, terminating about at the apex of the wing; 

 the branches of the discai vein not reaching the margin but stopping 

 just before it. Stigma faint. Halteres yellow. 



Female. Frons somewhat broad, brownish, with an impressed 

 middle line. The hairs on the thoracic disc and the bristles on ab- 



