546 Syrphidae. 



hairs on femora somewhat long: the hairs vary according to the colour 

 of the legs from almost all yellow to nearly all black; the front tibiæ 

 have some small bristles about the middle on the posterior side; the 

 middle femora have about three bristles behind the apex and the hind 

 femora have black, bristly hairs below the apical part; the posterior 

 tibiæ have a couple of bristles below the middle on the posterior side, 

 the middle tibiæ also generally some scattered, shorter bristles above 

 and on the anterior side ; the bristles may vary a little in number and 

 Hke the hairs they may vary from yellow to black. Wings yellowish 

 tinged on the base and the anterior part, on the apical part slightly 



Fig. 181. Wing of F. cuprea c?. 



blackish; from the base of the cubital vein downwards is a blackish 

 fascia and the medial cross-vein is blackish seamed. Stigma yellow. 

 Squamulæ whitish, the fringes yellow. Halteres with a yellow peduncle 

 and a brownish knob. 



Female. Similar to the male; vertex and frons broad, rather 

 widening downwards, as in the male quite black or brownish yellow ; 

 the frons is more or less pruinose across the middle; the hairs black. 

 The legs vary in colour as in the male. 



Length. This species varies not little in size, the length from 8 to 

 12 mm.; the female is the larger. 



As seen the species varies somewhat with regard to the colour 

 of the frons and the legs; the darker forms were described by Egger 

 as nigrifrons. With us the darker form seems to be the most common, 

 but the females are only more rarely dark. 



F. cuprea is not rare in Denmark, though hardly common; Char- 

 lottenlund, Ordrup Mose, Ermelund, Dyrehaven, Frederiksdal, Brede, 

 Holte, Geel Skov, Tisvilde, Faxe Ladeplads, Jægerspris, Boserup near 

 Roskilde and Tjustrup Sø; on Falster; on Lolland in Kældskov; on 

 Langeland at Lohals; on Funen, and in Jutland in Nørholm Skov at 

 Varde, at Horsens and Silkeborg. My dates are 21/5—^/9. It occurs 

 in wooded districts, sometimes on flowers, but generally on stems of 



