98 Orthorrhapha l)rachycera. 



dense ciliation below which is erect and vertical on the hind tibiæ, 

 and these latter with longer, bristly hairs above on the apical half; 

 tarsi densely haired below, and with small bristles at the apex of 

 the joints. The legs have further ordinary clothing of shorter hairs. 

 The hairs and bristles are black or brownish. Wings hyaline, very 

 slightly yellowish tinged; veins brown, costa conspieuously ciliated. 

 Stigma yellow. Halteres yellow. 



Female. Frons not broader than in the male; the bristles on 

 thorax shorter. The three last abdominal segments suddenly narrowed, 

 the styles of the ovipositor somewhat long. Legs as in the male and 

 haired in about the same way. Wings brownish tinged, especially on 

 the basal half. 



Length 5—6 mm. 



E. nitida seems to be rather rare in Denmark, only five speci- 

 mens, all females, have been caught, and all recently, in 1906, 1909 

 and 1910, the species not being known earlier as belonging to our 

 fauna. Ermelimd, Lyngby Mose (the author), Hillerød (Th. Mortensen) 

 and in Jutland at Silkeborg (A. Petersen); the dates are ^^/s — ^°/5, 

 the species is thus a spring species. 



Geographical distribution: — Europe down into Italy; towards 

 the north to middle Sweden, and in Finland. — Meigen notes that it 

 occurs on Taraxacum (Lowenzahn). Loew says 1. c, that it is not 

 known from Sweden, I do not understand how he has come to this 

 conclusion, as Zetterstedt in 1849 records it from Sweden and the 

 determination is beyond doubt; besides I have seen a Swedish 

 specimen. 



III. Subg. Pachymeria Stephens. 



Dark, sometimes a little lighter species of medium size. Eyes 

 separated in both sexes, frons a little narrower in the male; all facets 

 small. Antennæ somewhat short, first joint about as long as the 

 second or a little longer. Palpi sometimes (in non-Danish species) 

 elongated. Dorsocentral and acrostichal bristles biserial (in non-Danish 

 species they may be pluriserial). There are many humeral bristles, 

 some posthumeral, notopleural and supraalar and one postalar bristle. 

 (Some of the bristles may be indistinct, and in non-Danish species 

 the numbers may be different). Propleural hairs distinct, metapleural 

 bristles numerous. Scutellum with four bristles (four to eight in non- 

 Danish species). Abdomen without bristles. Male genitalia large. 

 The three last abdominal segments in the female suddenly narrowed; 

 the styli of the ovipositor not long. Hind femora more or less thickened, 

 sometimes (in non-Danish species) distinctly pennate in the female. 



