Moved from ID Request.

Eristalis interrupta ... female.
E. arbustorum, if it has clear orange markings,they have the markings reaching posterior margin of tergite 2.
E. stipator has a thin line of white hairs at posterior margin of tergite 2,3 and posterior of tergite 4 has long white whirled hair.
The minute pterostigma and rich chestnut hairs at the sides of thoracic dorsum and squamae orange... E. interrupta.
Eristalis hirta is the most similar and although it can have a small pterostigma it is not this minute and never such rich chestnut hairs at sides of thoracic dorsum and has the flagellum darker than this somewhat orange flagellum (best seen in other image).
E. obscura has a dark wing cloud, but recently emerged, especially males, can be without but two basal hind tarsi pale and pterostigma 3 times as long as broad.
E. rupium usually has wing cloud but recently emerged, especially males can be without but with pale hind tarsi and with longer darker eye hairs and pterostigma is 3.5 times as long as broad.
Other Eristalis can`t be confused....