Thirsty hoverfly. - Eumerus sp. ? (Eumerus sp. ?)

Taken on 15th July this year 2018 in my garden.

Spotted what I think is one of the Eumerus sp. overflies quenching its thirst with some of the fast evaporating morning dew on a rose leaf in my hedge.
Like many hoverfly species the identification down to the actual specie is nigh on impossible without microscopic observation or even sometimes dissection.
It was probably about 10mm or so in length but an interesting little fly.