New Hoverfly Species - Glass-winged Syrphus

Believing that four photos (body, wing veins, face and head/thorax junction) would generally get me an identification, I was disappointed to find that the male Hoverfly I photographed yesterday could only be determined if the hairs on the hind femur could be seen. So today I went out and found a female of the same species and that can be separated by the colour of the hind femur - much easier to see! On that basis I can say that this Hoverfly is the Glass-winged Syrphus (Syrphus vitripennis).