Chrysotoxum Hoverfly?

Chrysotoxum Hoverfly?

Observation - Chrysotoxum Hoverfly?. Description: When a learned tome such as Britain's Hoverflies dumps me amidst what it refers to as the difficult five, it's time for me to bail out at genus level.

When a learned tome such as Britain's Hoverflies dumps me amidst what it refers to as "the difficult five", it's time for me to bail out at genus level.