Posted by Vladimir Davydov on 30-11-2011 19:51
#1
Russia,St.-Petersburg region, Racji lakes, ~10mm, 14 may 2011
Edited by Vladimir Davydov on 01-12-2011 03:12
Posted by Ectemnius on 30-11-2011 21:43
#2
Yes, another Dasysyrphus. The lateral margins of the tergites are completly black and the underside of the 3rd antenna segment is pale.
That would make it D. pauxillus, a very nice species!
Note: the species, D. nigricornis is reportedly hard to seperate from D. pauxillus. I have, unfortunately, had no experience with nigricornis.
According to Speight (2003) the species D. pinastri, D. pauxillus, D. lenensis and D. nigricornis are not well defined at the moment.
Dasysyrphus are very nice, but taxonomically there are still some issues to be resolved...
Greets,
Ectemnius