Einpididae. 227 



podium with bristles below. The wings have the mediastinal vein 

 reaching the margin; the cubital vein is forked and the upper branch 

 is (normally) connected with the radial vein by a small cross-vein, 



Fig. 97. Wing of S-imllida. 



there are thus three cubital cells; discai vein forked and thus four 

 posterior cells; the discai cell long, sending three veins to the margin, 

 the third is the upper branch of the postical vein, closing the discai 

 cell below ; the lower branch of the postical vein is rectangular to the anal 

 vein; this latter reaches the margin; the first basal cell slightly longer 

 than the second, and the anal cell a little shorter than the second 

 basal cell. Stigma present. Axillary lobe small, the angle very obtuse. 

 Alula not developed, the margin here with hairs. Alar squamula 

 small, haired at the margin. 



The development stages are not known. 



The genus comprises only one species, also found in Denmark. 



1. S. pallida Loew. 



1858. Loew, Zeitschi'. fiir gesammt. Naturw. XI, 455, et 1871. Beschr. 

 eur. Dipt. II, 253, 138. — Kat. palåarkt. Dipt. II, 267. 



Male. Vertex and frons somewhat dark yellow, the ocellar triangle 

 grey ; epistoma, proboscis and palpi yellow. Occiput yellow with short 

 hairs. Antennæ short, yellow, darker towards the apex; the third 

 joint pointed ovate, compressed, with a short style. Thorax yellow, 

 with an indication of four, slightly darker stripes; it is very short and 

 sparingly haired. Scutellum with short, yellow marginal bristles. 

 Pleura yellow. Abdomen likewise yellow, with short, yellow hairs. 

 Venter yellow. Exterior genitalia large; the lower lamellæ directed 

 upwards and with a vertical impression, indicating a division into 

 two lobes, the posterior of these is the highest and above it is drawn 

 out into a forwards pointing process; the upper lamellæ are some- 

 what triangular, pointing forwards in over abdomen and with a little 

 tooth in the upper margin. Penis is very thick, curved upwards and 

 forwards. Legs yellow, very short-haired with yellow hairs. Wings 



15* 



