Eristalis - possibly nemorum

Eristalis - possibly  nemorum

Observation - Eristalis - possibly nemorum - UK and Ireland. Description: Observed in a small nature reserve in Uckfield. Sussex. Hoverfly feeding on umbellifer flowers. All corrections appreciated. Could be E. Nemorum as it has a dark hind metatarsus that looks to be thnner than the tibia. Don't think it's E. perinax as the

Observed in a small nature reserve in Uckfield. Sussex. Hoverfly feeding on umbellifer flowers. All corrections appreciated.
Could be E. Nemorum as it has a dark hind metatarsus that looks to be thnner than the tibia.
Don't think it's E. perinax as the front and middle tarsi are dark.