Posted by ChrisR on 23-04-2008 20:10
#1
Saw this yesterday (22/4/2008) in southern England. Is it
Syrphus vitripennis or
ribesii? Is the yellow area on the femora big enough to be
ribesii?
Posted by Dieter on 23-04-2008 20:59
#3
The colour of the femora is of no use to distinguish ribesii males from vitripennis. The crucial characters (microtrichia on cell bm, shape of probasisternum, setae on posterior mesocoxite) are usually not visible on fotos.
Cheers,
Dieter
Posted by ChrisR on 23-04-2008 21:48
#4
OK, no problem - thanks for the information :)