Syrphus. 281 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to northern Sweden, in Finland, and 

 on Iceland. 



3. S. venustus Meig. 



1822. Meig. Syst. Beschr. III, 299,38. - 1843. Zett. Dipt. Scand. II, 

 728,30 et 1849. VIII, 3141,30 et 1855. XII, 4658,30 (Scaf^va). — 1862. 

 Schin. F.A. I, 302. - 1901. Verr. Brit. Fl. VIII, 348, 3, fig. 287. — 1907. 

 Kat. palåarkt. Dipt. III, 71. — Scaeva hilaris Zett. 1843. 1. c. II, 729,31 et 

 1849. VIII, 3141, 31 et 1859. XIII, 5097, 31. — Syrphus hilaris 1862. Schin. 

 F. A. I, 302. — Syrphus implicatiis Meig. 1822. 1. c. III, 301, 42. — Scaeva 

 lunulata Zett. fnec Meig.) 1838. Ins. Lapp. 600,7 et 1843. Dipt. Scand. II, 

 731,34 et 1855. XII, 4658,34 et 1859. XIII, 5097,34. — Scaeva soli- 

 taria Zett. 1838. Ins. Lapp. 603, 18. 



Male. Frons æneous black, sornevvhat pruinose at the eye-margins ; 

 epistoma darker or paler yellow, slightly pruinose, with a broad, black 

 and shining middle stripe, stretching up to the antennæ, but this 

 stripe may diniinish in size and also in intensity of colour until quite 

 disappearing (hilaris); the mouth edge and lower side parts of epi- 

 stoma black; jowls greyish black. V^ertex and frons black-haired, the 

 former with some yellow hairs behind ; epistoma yellow-haired, but 

 with more or fewer black hairs down the sides, sometimes almost 

 quite black-haired. Occiput greyish yellow pruinose, the hairs yellow, 

 above a row of long, generally black hairs, overhanging the eyes. 

 Eyes with long, dense, pale hairs. Antennæ reddish or yeliowish, 

 third joint more or less brown above; sometimes the antennæ quite 

 yeliowish; third joint short ovate, shorter than the two basal joints 

 together; arista about as long the antennæ. Thorax æneous, shining, 

 clothed with yellow hairs. Scutellum brownish yellow or darker, pellucid 

 and shining bluish æneous; it has long hairs which are all yellow, or 

 more or less intermingled with black. Pleura with yellow hairs. Abdomen 

 dull black, shining at the apex; it has three pairs of yellow lunules; 

 the first pair less lunulate, lying about in the middle and isolated or 

 going over the sides above, second and third pairs broader or nar- 

 rovver, more or less lunulate, lying near the front margin and going 

 widely over the side margin ; the fourth and iifth segments have pale 

 hind margins, the fifth also small basal corner spots. The hairs on 

 abdomen follow mainly the ground colour, those at the side margin 

 rather long, alternating black and yellow according to the spots. 

 Venter yeliowish, pellucid, with a black band at the hind margins of 

 second and third segments, fourth segment almost quite black; on 

 second segment the band often weak or almost wanting; the venter 

 is clothed with long, yellow hairs. Genitalia somewhat large, black. 



