I found app. 30 mating couples of these tiny flies on a thistle (location Groningen in the north of the Netherlands/date 23-7-2008). Are these Chaetorellia jaceae?
With kind regards,
Bertus
Posted by Nosferatumyia on 24-07-2008 23:33
#2
Terellia (Cerajocera) tussilaginis. A pretty nice pic.