Diptera danica : genera and species of flies hitherto found in Denmark . frequenting various flowers. Geographical distribution:— Europe down into Italy, and onMadeira; it is not known from Scandinavia but it occurs in England,and is recorded from Siberia. 2. C. arcuatum L. 1758. Linn. Syst. Nat. X, 592 et 1767. XII, 2, 985, 39 et 1761. 1806 (Musca). — 1841. Loew, Stett. ent. Zeitg. II, 159, 3 et zool. bot. Geseli. Wien, VI, 609,4. — 1862. Schin. F. A. I, 253. —1901. Verr. Brit. Fl. VIII, 645, 2, figs. 443—444. — 1907. Kat. III, 145. — C. fasciolatum Meig. (n
Diptera danica : genera and species of flies hitherto found in Denmark . frequenting various flowers. Geographical distribution:— Europe down into Italy, and onMadeira; it is not known from Scandinavia but it occurs in England,and is recorded from Siberia. 2. C. arcuatum L. 1758. Linn. Syst. Nat. X, 592 et 1767. XII, 2, 985, 39 et 1761. 1806 (Musca). — 1841. Loew, Stett. ent. Zeitg. II, 159, 3 et zool. bot. Geseli. Wien, VI, 609,4. — 1862. Schin. F. A. I, 253. —1901. Verr. Brit. Fl. VIII, 645, 2, figs. 443—444. — 1907. Kat. III, 145. — C. fasciolatum Meig. (nec De G.) 1822. Syst. Beschr. III,170, 4. — 1843. Zett. Dipt. Scand. II, 634, 2 et 1849. VIII, 3108, 2 et1852. XI, 4300, 2 et 1859. XIII, 5074, 2. — C. hortense Meig. 1822. 1. , 173,8. Male. This species is very similar to cautum; the eyes are moredensely and longer haired, and the hairs are brown; epistoma with abroader black middle stripe and with some black hairs above at thesides of the antennæ; occiput all black-haired above. Antennæ with. Fig. 194. Antenna of C. arcuatum cS, from the inside. X 40. the third joint a little longer than the two basal joints together, thesecond (on the inside) almost not longer than the first. Thorax withthe greyish stripes abbreviated behind the middle, but there is nogreyish space in front of scutellum; the yellow spots on the sidesreaching near to each other; thorax and scutellum darker haired thanin cautum, the hairs nearly all blackish. Pleura black-haired aboveand behind. Abdomen more short ovate, more arched and morepointed than in cautum, with the fifth segment much smaller andcurved evenly downwards; abdomen is marked in the same way butthe yellow bows are more narrow, more curved and almost not Chrysotoxum. 573 widened towards the sides, and abdomen is thus more black; it isalso more shining, especially towards the apex; it is haired mainly asin cautum but the hairs just at the basal corners are black. Genit
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