#1
Hi,
is Syritta pipiens correct or do similar species exist (with such big femurs) that I don't know yet? 
2014-09-26, Germany, Schleswig-Holstein, Mohrkirch
Thank you!
Lennart
 
#2
Hello Lennart,
there are many Syrphidae with thickened femurs, but this is a typical 
Syritta pipiens female. Besides other characters the red spots on the femora are conspicous.