Syrphus hoverfly species, Tunstall Hills, Sunderland

Syrphus hoverfly species, Tunstall Hills, Sunderland

Observation - Syrphus hoverfly species, Tunstall Hills, Sunderland - UK and Ireland. Description: Hoverfly that resembles a wasp with yellow/black colouration. Individual observed basking on foliage, flying off and returning to the same spot. I understand that it is very difficult to separate Syrphus from photos. The colour of hind femur appears to be

Hoverfly that resembles a wasp with yellow/black colouration. Individual observed basking on foliage, flying off and returning to the same spot. I understand that it is very difficult to separate Syrphus from photos. The colour of hind femur appears to be entirely yellow which would lead me to S.ribessi but really not sure. All advice appreciated.