go Syrphidae. 



below front and hind tibiæ and tarsi an adpressed, yellow pubescence. 

 Wings a little yellowish or light brownish tinged, sometimes with an 

 indication of a brownish cloud on the middle; stigma brown. The 

 upper marginal cross-vein starting rectangularly below, bending more 

 or less angularly outwards before the middle and the upper part 



Fig. 13. Wing of P. virens. 



curved so that the upper angle is generally rectangular; the media- 

 stinal vein ending just before the middle cross-vein. Squamulæ whitish. 

 Halteres yellow. 



Female. Frons æneous black, slightly punctate, with a groove 

 above the antennæ, and with a very slight or indistinct transverse 

 depression, bounded above by an angular line with the top forwards; 

 it is whitish-haired but WMth a black-haired cross-band just in front 

 of the ocelli. Antennæ slightly longer than in the male. Eyes with 

 short, pale hairs. Pubescence on thorax a little shorter. 



Length 5,4 to about 7 mm. 



This species varies, as described, somewhat with regard to the 

 paleness of the base of the anterior tarsi ; the palest forms have been 

 described as annulata Macq. and varipes Meig. — V^errall says 1. c 

 about the third antennal joint "usually two and a half times longer 

 than deep", this raay be a lapsus for one and a half times, as his 

 figure shows. 



F. virens is a comrnon species in Denmark; Utterslev Mose, Vester 

 Fælled, Amager, Ordrup Mose, Ermelund, Dyrehaven, Lyngby Mose, 

 Ørholm, Tyvekrog, Tisvilde, Rørvig, Stevns, Nyraad near Vordingborg; 

 on Langeland at Lohals; on Lolland at Maribo, Kældskov and Strandby; 

 on Funen at Odense and Veflinge; in Jutland at Horsens, Aarhus, 

 Silkeborg and Laven, Søndervig, Bovbjerg, Rebbild near Skørping, 

 Thisted, Allerup, Sæby, Frederikshavn, Skagen, and on Læsø; finally 

 on Bornholm in Almindingen, at Hasle and Allinge; the dates are 

 '/s — *"/8. It occurs in low herbage on commons, in fens and woods, 

 especially on dry, but also on more humid localities. 



Geographical distribution: — All Europe, towards the north to 

 middle Sweden, and in Finland. 



