440 Syrphidae. 



Brit. Fl. VIII, 519, 9, figs. 356—357. — 1907. Kat. palåarkt. Dipt. III, 106. — 

 Syrphus flavocinctus var. /9. 1817. Fall. Dipt. Suec. Syrph. 24, 13. — Syr- 

 phus piceus Fall. 1817. 1. c. 24, U. — 1843. Zett. Dipt. Scand. Il, 656^ 3 

 et 1855. XII, 4650, 3. 



Male. Vertex black, somewhat dull, frons black, shining, narrowly 

 yellowish pruinose at the eye-margins ; epistoma whitish grey pruinose 

 but rather thinly so that the black ground colour is just visible; it 

 has the middle stripe, a broader or narrower mouth edge and the 

 lower lateral parts black, shining; jowls black. Vertex and frons black- 

 haired, epistoma with yellow hairs ; the epistoma very slightly hollowed 

 below the antennæ, somewhat retreating below the central knob and 

 rather descending. Occiput whitish pruinose along the eye-margin to 

 above the middle, for the rest black, slightly pruinose; the hairs are 

 whitish or pale yellow below, dark yellow above, and there are a few 

 black hairs at the upper eye-margin. Eyes with brown hairs. An- 

 tennæ blackish, third joint more or less brown, roundish ; arista brown, 

 plumose on a little more than the basal half. Thorax blackish brown, 

 somewhat shining, not pruinose on the front half; it is reddish yellow- 

 haired with somewhat long hairs. Scutellum brown with more or 

 fewer black hairs at the base, for the rest haired as thorax. Pleura 

 with long, yellow hairs. Abdomen black, dull, third and fourth seg- 

 ments with a transverse middle band shining black or bluish, fourth 

 segment often with the dull margins less distinct; second segment has 

 two indwardly triangular, yellow side spots, which generally do not 

 reach quite to the hind margin at the sides; the third segment has 

 small or no basal corner spots; the spots are shining; the segments 

 have pale yellow hind margins. Abdomen is clothed with yellow hairs, 

 pale just at the base, black on the hind margins, on the third seg- 

 ment to a great degree, the fourth segment often quite yellow-haired. 

 Venter greyish black with pale incisures and long, yellow hairs. Legs 

 somewhat thin and slender, black, the apex of femora yellow, on the 

 hind femora sometimes the extreme base brownish; about the basal 

 half of tibiæ whitish yellow, on front and hind tibiæ generally less 

 than the half; front tarsi black or very slightly brownish at the base, 

 posterior tarsi with the two basal joints yellow with black apex, on 

 the hind tarsi they are sometimes brown; hind tibiæ very slightly 

 compressed and almost not curved ; hind metatarsi not thickened. The 

 legs haired as usual, the hairs mainly yellow but blackish behind the 

 front femora, sometimes yellow at the base, and behind apex of 

 middle femora generally some dark hairs; hind femora more or less 

 black-haired on the apical part, but the long hairs below pale ; anterior 

 tibiæ yellow-haired, hind tibiæ with the very short fringe above and 



