Diptera danica : genera and species of flies hitherto found in Denmark . ightlybrownish; thorax clothed with yellow hairs, densest at the yellow, with blackish hairs on the disc. Pleura with long,yellow hairs. Abdomen somewhat marginale, duU black, shining atbase and apex. It has three pairs of yellow lunules about as inluniger and isolated from the side margins; the first pair transverselyoblong, not sloping forwards at the sides; fourth and fifth segmentswith narrow, yellow hind margins. The hairs on abdomen follow theground colour, at the sides they are long and yellow at th
Diptera danica : genera and species of flies hitherto found in Denmark . ightlybrownish; thorax clothed with yellow hairs, densest at the yellow, with blackish hairs on the disc. Pleura with long,yellow hairs. Abdomen somewhat marginale, duU black, shining atbase and apex. It has three pairs of yellow lunules about as inluniger and isolated from the side margins; the first pair transverselyoblong, not sloping forwards at the sides; fourth and fifth segmentswith narrow, yellow hind margins. The hairs on abdomen follow theground colour, at the sides they are long and yellow at the base, forthe rest black. Venter yellowish, with large, black, transverse spotson the segments; it has long, pale hairs, towards the apex they areshorter and dark. Genitalia of medium size, black. Legs yellow,anterior femora with the basal third black, hind femora except theapex black or blackish; hind tibiæ with a faint, dark ring in themiddle; tarsi with the three middle joints blackish, hind metatarsusbrownish. The long hairs on femora mainly yellow, only towards. Fig. 124. Wing of S. lapponicus d. apex some black; the short hairs dark on the anterior side of hindfemora and mostly dark on hind tibiæ, for the rest yellow. Wingsnearly hyaline; the cubital vein distinctly dipped down above the firstposterior cell. Squamulæ pale yellow with yellow margin and yellow. Syrphus. 311 Fernale. Vertex broad, black and shining, the black space near]yquadrate, from it goes a black middle line forwards which soon widensand forms a large, black Imiule above the antennæ; side dust spotslarge; the hairs black. Abdominal lunules distinctly narrower than inthe male. Legs as in the male, tårsi, especially the front ones, ratherobviously flattened. Length about 10—11,5 mm. S. lapponicus is very rare i Denmark, we have only one specimen,a male, taken by Stæger in Ordrup on ^^li 1843, no doubt just thespecimen mentioned by Zetterstedt (1. c. VIII, 3131). Geographical dist
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