318 Syrphidae. 



larvæ were taken on Sambucus aniong Aphides in Dyrehaven on ^V?, 

 they developed on '^/8, and on Brassica at Maribo in August (Schlick) ; 

 pupæ haven been taken on Phragmites,. Typha, Rosa and Rheuni 

 between ^^/t and ^^/s, developing between *^ls and ^^/s. 



Geographical distribution : — Widely distributed species ; all Europe, 

 towards the north to middle Sweden, and in Finland ; further it occurs 

 in Asia to Japan, in North Africa, on Madeira and the Canaries. 



^3. S. cinctellus Zett. 



1843. Zett. Dipt. Scand. II, 742, 45 et 1849. VIII, 3143,45 (Scaeva). 

 — 1862. Schin. F. A. I, 312. — 1901. Verr. Brit. Fl. VIII, 392, 23. — 

 1907. Kat. palåarkt. Dipt. III, 62. — Scaeva cincta Fall. p. p. 1817. Dipt. 

 Suec. Syrph. 45, 18. 



Male. Vertex æneous, elongated triangular; frons and epistoma 

 somewhat narrow, the central knob elongated; frons yellow and yel- 

 low pruinose, above the antennæ a large, very definitely marked, 

 black and shining, semicircular spot, a little tridentate in front; epi- 

 stoma yellow and yellowish pruinose, the knob shining and sometimes 

 a little darkened ; mouth edge reddish. Jowls yellow, along the eye- 

 margin more or less grey pruinose. Vertex and frons black-haired, 

 the latter sometimes with paler hairs; epistoma with yellow hairs. 

 Occiput grey pruinose with white hairs below, yellow upwards; there 



Fig. 126. Antenna of S. cinctellus ^, from the inside, x 60. 



are no black hairs above. Eyes bare. Antennæ somewhat short, 

 reddish, third joint more or less blackish above; the third joint short 

 oval, not longer than the two basal joints together; arista distinctly 

 longer than the antennæ, slightly pubescent. Thorax æneous or brass- 

 coloured, sometimes a little greenish or coppery, shining; the præ- 

 sutural depression yellowish pruinose; the thorax is clothed with dark 

 yellow hairs, rather long behind, and here often brownish. Scutellum 

 yellow with a bluish reflex and with long, black hairs. Pleura with 

 yellow hairs. Abdomen long and narrow, narrower than thorax and 



