. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. Empididae. 137 E. nigricans is not common in Denmark and has only been taken a few times; Ordrup Mose, Ermelund, and on Funen; my dates are ^h—^/s. Zetterstedt records it as frequenting the flowers of Carduus. Geographical distribution: — Nortiiern and middle Europe down into France; towards the north to middle Sweden. 28. E. borealis L. 1761. Linn. Fn. Suec. 1899. — 1822. Meig. Syst. Beschr. III, 36, 37. — 1842. Zelt. Dipt. Scand. I, 370, 2. — 1862. Schin. F. A. I, 105. — 1903. Kat. palaarkt. Dipt. I
. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. Empididae. 137 E. nigricans is not common in Denmark and has only been taken a few times; Ordrup Mose, Ermelund, and on Funen; my dates are ^h—^/s. Zetterstedt records it as frequenting the flowers of Carduus. Geographical distribution: — Nortiiern and middle Europe down into France; towards the north to middle Sweden. 28. E. borealis L. 1761. Linn. Fn. Suec. 1899. — 1822. Meig. Syst. Beschr. III, 36, 37. — 1842. Zelt. Dipt. Scand. I, 370, 2. — 1862. Schin. F. A. I, 105. — 1903. Kat. palaarkt. Dipt. II, 334. Male. Eyes contiguous; frontal triangle and epistoma brownish grev. Occiput grey, with long, black, downwards brownish hairs. Labrum not, or scarcely twice as long as the head is high; palpi blackish, with long, black hairs. Antennæ long, longer than the head, black, first joint twice as long as the second, the third elongated, very slightly attenuated towards the apex; the style short; the two first joints with longish, black hairs. Thorax dark greyish brown, with four blackish brown stripes, the two median abbreviated behind, the two lateral generally less distinct and abbreviated at both ends. The dorsocentral hairs pluriserial, the acrostichal biserial, all long and fine, black; the dorsocentral hairs strong and a little longer behind; the sides of the disc with similar hairs, fused with the dorsocentral hairs. There are three or four notopleural bristles, a supraalar and a strenger and a weaker postalar bristle, all black, but there are no humeral or posthumeral bristles discernible between the long hairs. Scutellum has six black marginal bristles. Pleura grey, meta- pleura with black bristles; propleura with black hairs. Abdomen greyish brown, slightly shining, clothed above with short, at the sides with long, erect, black hairs, which are slightly stronger at the hind margins of the segments. Venter similarly coloured, with long, black hairs. Exterio
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