Diptera danica : genera and species of flies hitherto found in Denmark . Fig. 44. Antenna of O. brevicornis 9, from the inside. X 80. black setulose beneath. Wings slightly tinged; stigma brownish andbelow it a somewhat indistinct brownish cloud; upper marginal cross-vein about perpendicular but curved out in the middle. Squamulæyellowish white with a yellow fringe. Plumula darker than in theother species. Halteres whitish yellow. Female. Frons very broad, with a depressed middle stripe andin front of it a dot-like impression; on each side a number of cross- 106 Syrphidae. fuiTOws. Frons and e
Diptera danica : genera and species of flies hitherto found in Denmark . Fig. 44. Antenna of O. brevicornis 9, from the inside. X 80. black setulose beneath. Wings slightly tinged; stigma brownish andbelow it a somewhat indistinct brownish cloud; upper marginal cross-vein about perpendicular but curved out in the middle. Squamulæyellowish white with a yellow fringe. Plumula darker than in theother species. Halteres whitish yellow. Female. Frons very broad, with a depressed middle stripe andin front of it a dot-like impression; on each side a number of cross- 106 Syrphidae. fuiTOws. Frons and epistoma a little rnore conspicuously haired thanin the male, Antennæ with the third joint soraewhat larger, generallypale at the base below. Thorax a little more conspicuously hairythan in the male, the stripes more conspicuous. Abdomen æneousor coppery at the sides and less duU on the disc, rather densely punc-. Fig. 45. Wing of O. hrevicornis Q. tate and densely hairy; fourth segment without wart. Hind femoranot setulose beneath. Wings more evenly and less tinged or almosthyaline. Length 5,6 to about 7 mm. O. brevicornis is rare in Denmark, only four specimens, all femaleshave been taken; Ordrup Mose, Ermelund, Lyngby Mose and at FureSø (the author); the dates are ^^/o—^^e; the first specimen was takenin 1906. It occurs on flowers in fens and on humid piaces. Geographical distribution:— Europe down into Italy; it is notknown north of Denmark, but occurs i England. 5. O. nobilis Fall. 1817. Fall. Dipt. Suec. Syrph. 57, 17 {Eristalis). — 1822. Meig. 111, 272, 13, Tab. XXX, Fig. 18. — 1843. Zett. Dipt. Scand. [I,823, 7. — 1843. Loew, Stett. ent. Zeitg. IV, 262, Tab. 111, Fig. 16—18. —1862. Schin. F. A. 1, 272. — 1901. Verr. Brit. FJ. VIII, 190, 3, figs. 201-202. — 1907. Kat. palåarkt. Dipt. III, 16. — Chrysogaster nigrkollis Syst. Beschr. III, 271,
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