Posted by Helga Becker on 25-10-2015 15:41
#1
Hello,
Can you help me with identification of this fly?
Thenauriegel bei Breitenbrunn / Neusiedler See / Österreich 12. Mai 2007
Best regards
Helga Becker
Posted by johnes81 on 22-10-2016 10:53
#4
if the following keys are accurate, then you have a photo of versicolor:
Parhelophilus versicolor
Occiput entirely yellow pilose
face profile convex
costa with extensive golden pile basally, extending beyond humeral crossvein
the hairs in the area of the occiput are entirely yellow/golden.
Parhelophilus versicolor
I have no idea why noone answered your question. interesting. I hope that you have a pleasant day.
Edited by johnes81 on 22-10-2016 10:54
Posted by Sundew on 26-10-2016 23:36
#5
I think no-one replied because the species are tricky. Ball & Morris (2013) write: "These two species are very difficult to separate, especially the females. Determining the sex is also difficult ... - the best way to check is to look for a genital capsule; the abdomen of females is tapered." The males can be told apart by a long-haired tubercle underneath the hind femur in
P. frutetorum, which lacks in
P. versicolor. But this character is not helpful in our case. The text above is not a "key", as no alternatives are given, but a description of characters of one species; the other might look similar. In
http://www.natur-...-322.html# it is stated that the hairs on the vertex of
P. versicolor are entirely yellow, whereas in
P. frutetorum there are yellow plus black hairs. The vertex of your fly seems to be rather dark, so black hairs might be present. However, if even Menno Reemer doesn't dare to decide in
http://www.dipter...d_id=39004, I do not either...
Regards, Sundew
Edited by Sundew on 26-10-2016 23:37