New Species - Marmalade Fly (Episyrphus balteatus)

I am reasonably confident of this ID although the lack of eyes and antennae made it a a little more difficult. I found it in the house in a state of decay but the markings of this particular hoverfly are distinctive according to my excellent Hoverfly Guide (Ball and Morris). The photo is about 25x magnification. The wings were less than 1cm long.