552 



Syrphidae. 



fourth segment. Legs yellow or reddish yellow, front tibiæ except 

 the basal part and front tarsi black, anterior femora generally brownish 

 below; the hind femora have a triangular process below near the 

 apex towards the anterior side; the legs short-haired, only the middle 

 femora with longer hairs behind and the front femora with slightly 

 longer hairs behind; hind femora quite short-haired; the hairs black 

 and yellow, those behind and below the front femora and the short 

 hairs above and below middle femora black, and on middle femora 

 also the long hairs black towards the apex; hind femora black-haired 

 except generally on the posterior side and along the middle of the 

 anterior side, the hairs below somewhat bristly; front tibiæ with the 

 hairs on the black part somewhat dark, posterior tibiæ yellow-haired 

 but the hind tibiæ with a short fringe below, which is longest and 

 black on the middle part, and sometimes there are also some black 

 hairs above. Wings yellow at the base and anterior margin; stigma 



Fig. 184. Wing of S.saltuiim d. 



quite small, below it a small browning and from here to the apex 

 the anterior part is brown down to the cubital vein, but the browning 

 often slight. Squamulæ whitish, the thoracai squamula with the margin 

 and fringe of the same colour, but alar squamula with a brownish 

 margin and fringe. Halteres orange or yellow. 



Female. Vertex moderately broad, frons somewhat rapidly widening 

 downwards; the vertex black, frons yellow with a black middle stripe 

 from vertex to antennæ; the hairs black. Abdomen has in all eight 

 bands, as the fifth segment is marked like the others, but the black 

 colour forming only a narrow, transverse band ; often only the yellow 

 hind part of the segment visible. 



Length 12— 16 mm. 



S. saltiium is rare in Denmark and all our specimens are from 

 earlier time, while it has not been taken in recent times ; the specimens 

 are from the vicinity of Copenhagen and from Dyrehaven (Drewsen); 

 the sole date is ^^'Is. It is recorded to frequent especially Umbelliferæ. 



