Posted by Nikita Vikhrev on 21-07-2006 18:20
#1
Moscow region, 21 july, 5mm.
Wings obviosly dark, without akcilar corner, face silverish-white.
By Bey-Bienko I've got Dolichopus longitarsis. Only female collected.
Posted by Kahis on 21-07-2006 18:37
#2
The female is a typical
Dolichopus longitarsis.
The male is not a
Dolichopus at all but
Gymnopternus chalybeus (in genus Hercostomus in your key).
Both species are common in herb-rich fens.
G. chalybeus loves the same habitat as the plant
Comarum palustre (=
Potentilla p.) and the fly is almost always found among dense stands of this plant.
Posted by Nikita Vikhrev on 21-07-2006 20:55
#3
Thank you Kahis.
Tomorrow I'll come back for Gymnopternus chalybeus, it is good oppotunity to understand this genus! Place is exactly as you discribed.
Nikita