390 Orthorrhapha brachycera. 



somewhat reniform, a little pointed towards below; the arista is dorsal, 

 apparently inserted near the base, in reality in the front margin near 

 the upper edge; it is much longer than the antennæ, its first joint 

 short. The basal antennal joint is bare, the second has small bristles 

 at the apex, the third and the arista with short but distinct hairs. 

 Epistoma narrow in the male and narrowest downwards, in the female 

 a little broader and with the margins about parallel; the clypeus is 

 small, it is separated from the epistoma by a small notch at each 

 side ; it does not qnite reach the lower margin of the eyes, Proboscis 

 a little protruding, it and the oral aperture a little larger, and the 

 proboscis more protruding in the female than in the male. Labrum 

 chiefly of the usual shape, high at the base, strongly canaliculated, 

 with a somewhat rounded, slightly chitinised median tooth, and below 

 two more chitinised lateral teeth of the same length as the median; 

 hypopharynx triangularly elongated, of the same length as labrum, 

 with the apex curved downwards, and with a distinct salivary duet; 

 the maxillary palpi triangularly oval, pointed, short hairy, with a 

 single bristle on the front side. Labium less chitinised than usual, 

 yellow; the basal part about of the length of the labella, cleft into 

 two processes behind; the labella are somewhat long, not very broad, 

 with radiating ribs, and with bristles at the margin. Thorax rect- 

 angular, somewhat high, and arched above; behind, in front of the 

 scutellum, it has a somewhat large, flat or slightly concave area; pro- 

 and metathorax small, the former with a few, small bristles above. 

 Acrostichal bristles practically absent (there are in reality a few quite 

 in front); there are five dorsocentral bristles; further a humeral bristle, 

 and generally a weaker, a posthumeral, two notopleural, a præsutural, 

 three supraalar and a postalar bristle; the front part of the disc with 

 very few, small hairs. Propleura with one prothoracic bristle. Scu- 

 tellum with two marginal bristles, and with a very small hair at each 

 side. Abdomen not long, a little depressed, knobbed behind in the 

 male on account of the hypopygium; in the male there are six visible 

 dorsal segments of about the same length, only the first a little 

 shorter; on the ventral side there are five segments seen, the first of 

 which as usual very small; the sixth is folded up; the seventh seg- 

 ment is small and quite hidden. Hypopygium large and swollen; it 

 is not imbedded but lies free at the end of abdomen, directed down- 

 wards and a little forwards; the eighth segment is rather large; the 

 hypopygium is roundish; there are somewhat long, forwards directed 

 posterior lobes (or inner lamellæ), which are curved towards each 

 other, and there are small, somewhat lancet-shaped, hairy outer 

 lamellæ, with a narrowed apical part, and united in the middle, with 



