282 Syrphidae. 



with black and yellow hairs. Legs yellow, the basal part or half of 

 anterior femora and the three fourths of hind femora black; hind tibiæ 

 with a more or less distinct, blackish or brovvn ring; third and fourth 

 joints of anterior tarsi a little darkened, and the three middle joints 

 of hind tarsi blackish. The hairs on femora yellow, and likewise the 

 short hairs on tibiæ except partly above the hind tibiæ. Wings almost 

 hyaline or somewhat brownish tinged towards the anterior margin. 

 Squamulæ whitish with yellow margin and fringe. Halteres yellow. 



Female. Frons broad, shining black, with distinct, yellow side 

 dust spots; it is black-haired. Abdomen somewhat shining, the spots 

 generally narrower than in the male. 



Length 8 — 10,5 mm. 



The larva and pupa quite resemble those of 6'. alhostriatus both 

 in shape and colour. 



S. venustus is a common species in Denmark; Frederiksberg Have, 

 Ordrup Mose, Ermelund, Dyrehaven, Lyngby Mose, Bagsvær, Ryget 

 Skov at Farum Sø, Geel Skov, Ørholm, Donse, Birkerød, Tyvekrog, 

 Tisvilde; on Lolland at Maribo, in Kældskov, Dødemose and at Strandby; 

 on Funen at Middelfart, and in Jutland in Greisdalen at Vejle and at 

 Horsens. My dates are ^^Ib—^h. It is exclusively a spring species, it 

 occm's on various flowcrs, especially Compositæ, in woods and on 

 meadows and fields near woods. The larva was taken in Ermelund 

 on the ground on ^/4, it pupated on ^/4 and developed on ^/s (Kryger). 



Geographical distribution: — Europe down into France, Corsica 

 and perhaps Italy; towards the north to northern Sweden, and in 

 Finland. 



4. S. lunulatus Meig. 



1822. Meig. Syst. Beschr. III, 299, 33. — 1862. Schin. F. A. I, 303. 

 — 1901. Verr. Brit. Fl. VIII, 351, 4, fig. 288. — 1907. Kat. palaarkt. Dipt. 

 III, 67. — Scaeva arcuata Fall. p. p. 1817 Dipt. Suec. Syrph. 42. — ? Musca 

 pinastri De Geer, Mém. Ins. VI, 1776, III, 113, PI. 7, Fig. 1—7. 



Male. Frons bluish black, somewhat greyish pruinose, especially 

 towards the eye-margins; epistoma paler or darker yellow or greenish 

 yellow, with a broad, black middle stripe, reaching about to the 

 antennæ, the mouth edge and the lower lateral corners black; jowls 

 black, greyish pruinose. Vertex and frons black-haired; the former 

 with yellow hairs behind; epistoma yellow-haired, downwards gener- 

 ally some black hairs. Occiput grey pruinose, the hairs white below, 

 yellow upwards; above more or fewer black, overhanging hairs. Eyes 

 with dense, longish, pale hairs. Antennæ black, third joint short ovate, 

 not so long as the two basal joints together; arista about as long as 



