Posted by
romunov on 19-03-2009 08:22
#1
Are straight or nearly so R4+5 veins common in
Scaeva selenitica? My specimen is possibly
S. selenitica (this is one of three early species found locally by M. de Groot who suggested the ID) yet when I try to confirm the ID by key, I overshoot it when I compare the vein, landing in
Melangyna.
Also, when I try to ID the species (on page 194), I can't see the mentioned distinctly larger anterodorsal facets (designated for
S. mecogramma males.
Any comments appreciated.
Posted by
romunov on 20-03-2009 22:45
#2
I believe my fly may be actually
Melanogyna (perhaps
compositarum), which explains the R4+5 shape (or the other way around
).
Posted by
Andre on 22-03-2009 20:58
#3
Scaeva is a lot larger than
Melangyna and much more robust.
So if you have a generally 'slender' specimen, it's probably not
Scaeva.
Compare with pictures in the Syrphidae Gallery of diptera.info...
Posted by
romunov on 23-03-2009 00:01
#4
Now that you've mentioned it, I did see
S. selenitica near the faculty the other day, and it did appear a bit larger. However, I'm extremely fresh at this and size and shades of colors aren't that apparent yet. With time, my eye will develop for the "jizz".