Posted by Sundew on 22-05-2014 22:35
#1
Hi,
Today I visited the heavily exudating elm tree of thread
http://www.dipter...d_id=38628 and was delighted to find a male of
Sphiximorpha subsessilis again! Furthermore, there was a grey and yellow fly hovering around the trunk, and when it sat down and allowed for some photos I saw the vena spuria of a Syrphid. So
Brachyopa bicolor, feeding on tree saps, would fit perfectly! What do you say?
Regards, Sundew
Posted by Valentin Nidergas on 23-05-2014 19:38
#2
It's very difficult to say... so, it's necessary to observe the arista with a microscope.
But perhaps someone could be identify it without the microsopical characters ! :)
Posted by Sundew on 23-05-2014 20:01
#3
I see... I did not know that there are so many similar species. Meanwhile I found out that as much as nine species are listed for Berlin. So this interesting fly must remain a
Brachyopa spec. Many thanks, Valentin!