Posted by blowave on 24-07-2011 01:35
#8
Sundew wrote:
I'd like to cite the opinion of Roger K. A. Morris in another forum (
http://www.hoverf...eccfea625b):
"
Melangyna cannot be done from photos. ... The most likely grouping is either
M. labiatarum or
M. compositarum but microscopic examination is needed to separate the males - females cannot be separated."
You have cited the opinion of Roger Morris. :)
But, that is nearly three years ago! I am well aware of the threads on the HRS site.
May I bring your attention to a thread on this site which might make things a little clearer..
http://diptera.in...ost_114015
Unfortunately the thread was never updated. As the latest edition of Mark van Veen keys "Hoverflies of Northwest Europe" states that the two species "
may be a single species" but gives keys to both (females included), and the keys post date both the thread you have linked to and the thread here which I have linked to, someone out there might know the latest on this.