face black medial stripe
white thorax marks
yellow femur hairs
No interactions present.
The "Bat" shaped mark on top of the thorax is distinctive in this hoverfly.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
As you say, Eriozona has moustache bands, but this fly does not...moustache bands are when the yellow stretches across the abdomen, without a break in the middle. And Eriozona has a dipped vein, but that is only a shallow dip, not a real loop like this fly. They are quite different, really, but not when you are just starting out with hoverflies! Eriozona would be a good find, they are so similar to Syrphus they are hard to pick out.
My Flickr photos...
Lat/Lng: 52.0565, -0.7168
OS grid ref: SP880405