208 Orthorrhapha brachycera. 



2. L. sphenoptera Loew. 



1873. Loew, Beschr. eur. Dipt. III, 215, 136. — 1903. Kat. palaarkt. 

 Dipt. II, 261. 



Male. Eyes not quite touching, but leaving a very narrow, black 

 frontal stripe; on the other hånd they are touching below the antennæ, 

 so that no epistoma is present. Proboscis yellow, palpi black. Occiput 

 grey, with black, downwards with pale hairs. Antennæ inserted above 

 the middle, black or brownish black, the third joint somewhat elongated. 

 Thorax black, shining; the prothoracic parts both above and on the 

 sides with a beautiful silvery pruinosity. The dorsocentral and acro- 

 stichal bristles short and thin, black; the former uniserial, not longer 

 behind, the latter biserial. A long and strong notopleural and a 

 shorter postalar bristle present, both black; besides there are some 

 small hairs on the humeri and in the præsutural depression. Scutellum 

 with two long, black marginal bristles and a pair of small hairs later- 

 ally. Pleura black, somewhat shining. Abdomen black, shining, it 

 may be somewhat translucently pale towards the base and at the 

 sides ; it is clothed with pale yellow hairs and has somewhat stronger 

 marginal bristles on the segments. Venter brownish or more or less 

 pale, with pale yellowish hairs. The exterior genitalia form a l'orceps 

 with large, swollen arms, and there is a long, somewhat sinuous 

 penis, which is curved upwards. Legs yellowish white or yellow, the 

 hind tibiæ brownish towards the apex; the hind tibiæ are very 

 slightly thickened and curved a little outwards towards the apex; 

 tarsi brownish outwards, the last joints blackish. The legs are some- 

 what sparingly clothed with shorter and longer hairs ; the front femora 

 have short, strong hairs on the anterior side; the posterior femora 

 have long, erect hairs below, and the hind femora an apical bristle 

 on the anterior side; the middle tibiæ have some long bristles on the 

 antero- and postero-dorsal side; the hind tibiæ are ciliated below and 



Fig. 85. Wing of L. sphenoptera. 



with some long, thin hairs, the ciliation is dense towards the apex, 

 above there is a pair of bristles near the apex. The hairs are paler 

 or darker brown, the bristles black. Wings narrow, and with the 



