332 Syrphidae. 



antennæ with a longer arista, the shape of the abdoniinal markings, 

 the colour of the venter and the partly or mainly yellow-haired 

 scutellum: it is also less punctate and more pubescent, 



S. laswpJithalmus is not properly common in Denmark, though 

 sometimes present in some number; Copenhagen in a garden, Ordrup 

 Mose, Ermekmd, Holte, Geel Skov, Donse, Hillerød, Tyvekrog, Tisvilde; 

 on Funen between Odense and Middelfart. It occurs in early spring, 

 my dates are ^*/4 — ^'U. I have taken it hovering about the flovvers of 

 Prunus spinosa and Salix, and once I took it rather numerously on 

 ^S/4 on the flowers of Anemone nemorosa and Ficaria; it seems to 

 be more common in some years than in others. 



Geographieal distribution: — Northern and middle Europe down 

 into Austria, Hungaria and Styria, and also recorded from Italy; to- 

 wards the north to northern Sweden. and in Finland. 



30. S. guttatus Fall. 



1817. Fall. Dipt. Suec. Syrph. 44, 16 (Scaeca). — 1822. Meig. Syst. 

 Beschr. 111, 322, 71. — 1843. Zett. Dipt. Scand. Il, 739, 41 et 1849. VIII, 

 3143, 41 et 1855. XII, 4659, 41 {Scaeva). — 1862. Schin. F. A. I. 307. 

 — 1901. VeiT. Brit. Fl. VIII, 407,29. — 1907. Kat. palåarkt. Dipt. III, 65. 



Of this species I know only the female. Vertex not broad, æneous, 

 shining; frons and epistoma rather narrow, frons yellow, from the 

 vertex an æneous black, often attenuated, middle stripe is produced 

 to below the middle; there are no dust spots; epistoma all pale yel- 

 low, white pruinose except the central knob. The hairs on vertex 

 and frons dark, on epistoma white. Jowls narrow, white. Occiput 

 greyish white pruinose below, yellow above. the hairs likewise white 

 below, yellow above. Eyes bare. Antennæ short, black, third joint 

 roundish; arista fully as long the antennæ. Thorax bright æneous or 

 brass-coloured, shining, along the sides a distinct. yellow line. especi- 

 ally distinct on the hurneri and backwards to the wing-root; in front 

 of scutellum the disc has a yellow, more or less bifid. sometimes 

 divided spot. The thorax has yellow hairs. Scutellum yellow with 

 yellow hairs. Pleura grey pruinose with white hairs. Abdomen nar- 

 row and linear, black, first segment yellowish grey at the sides; there 

 are three pairs of elongated oval, transverse, white spots; the first 

 pair are smallest and lie on the middle of the segment; the second 

 and third pairs lie near to, or at the front margins; they are all well 

 separated in the middle, the basal spots most widely, and they are 

 all isolated from the side margins; the fifth segment has transversely 

 triangular spots at the basal corners, almost meeting in the middle, 

 and a very narrow, pale hind margin. The hairs on abdomen follow 



