104 Orthorrhapha brachycera. 



obtuse bend; the axillary lobe large, anal vein going downwards. 

 Squamulæ yellow, with a black fringe. Balteres yellow. 



Female. Epistoma broader than in the male, yellow or greyish 

 yellow. Antennæ shorter, the third joint triangular, Middle legs simple ; 

 hind tibiæ sometimes a little darkened at the apex; hind femora short- 

 haired below. Wings with the axillary lobe smaller, anal vein going 

 more forwards. 



Length 4,6 — 5,7 mm. 



D. pennatus is one of the most common species in Denmark; 

 Amager, Vester Fælled, Damhusmosen, Utterslev Mose, Ordrup Mose, 

 Ermelund, Lyngby Mose, Fure Sø, Ørholra, Hillerød, Tryggerød, Frede- 

 rikssund, Boserup at Roskilde, Gisselfeldt, Faxe Ladeplads and Nyraad 

 near Vordingborg ; on Langeland at Lohals; on Funen at Odense and 

 Veflinge; in Jutland at Bovbjerg, Silkeborg, Rye and Laven near 

 Silkeborg, Frijsenborg, Hald near Viborg, Tinbæk Mølle at Lindenborg 

 Aa, Frederikshavn ; fmally on Bornholm at Allinge and Rønne. My 

 dates are ^le — ^"/s. It occurs in fens and on humid piaces in woods 

 generally near water, on bushes and in low herbage. 



Geographical distribution : — Northern and middle Europe down 

 into France and on Gorsica; towards the north to northern Scandinavia, 

 and in Finland. 



Remarks: In Kat. palåarkt. Dipt. II, 304, Stæger's signatus is 

 quoted under signatus Meig. but this is not correct; both the descrip- 

 tion by Stæger, and the specimens in the collection prove, that Stæger's 

 species is pennatus Meig ; signatus does not occur in Denmark, it seems 

 to be a more southern species, as it is not found in Scandinavia. 



22. D. popularis Wied. 



1817. Wied. Zool. Mag. I, 70, 15. — 1824. Meig. Syst. Beschr. IV, 

 91,30. — 1831. Stann. Isis 1831,66,16. — 1842. Stæg. Krøyer's Tidsskr. 

 IV, 26, 17. — 1843. Zelt. Dipt. Scand. II, 545,37, et 1855. XII, 4629,37. 

 — 1862. Schin. F. A. I, 217. — 1903. Kat. palåarkt. Dipt. II, 303. 



Male. Vertex and frons green. Epistoma narrow, ochraceous. 

 Palpi yellow. Occiput greenish or æneous, greyish pruinose; post- 

 ocular bristles yellow below, black above. Antennæ not quite as long 

 at the head, the third joint somewat ovate; they are yellow, the third 

 joint blackish above and at the apex. Thorax green or golden green, 

 somewhat pruinose, shining; there is generally a less pruinose, more 

 shining and brighter or more golden middle stripe; scutellum finely 

 yellow pubescent ; postscutellum greenish, grey pruinose. Pleura greenish 

 or æneous, greyish pruinose; propleura with fine, pale hairs and a 

 black prothoracic bristle. Abdomen green with more or less distinct, 



