The main obvious thing excluding Syrphus is the shape of the yellow bars across the abdomen. The shape of the markings of Eupodes corollae are very variable and may or may not be joined, but do not resemble the band shape of Syrphus. Syrphus have the squama (lower lobe at the base of the wing) with long hairs on the dorsal surface but you will almost certainly not be able to see this in a photograph. However to identify Syrphus correctly to species requires microscopical examination of characters, as does the id of many hoverflies. Alan Stubb's British Hoverflies published by the British Entomological and Natural History Society is a must for anyone wanting to do hoverfly identification.
Your Forum
This forum has now been more or less replaced by the Club's Facebook page at 
The weblog below is for naturalists to use to report interesting sightings, ask questions, report on field meetings and generally post pictures and any information or questions generally relevant in some way to the wildlife and geology of Essex. You will need to register and be logged-on to post to the forum, and you need to upload pictures first, for use in posts. Find out more
The weblog below is for naturalists to use to report interesting sightings, ask questions, report on field meetings and generally post pictures and any information or questions generally relevant in some way to the wildlife and geology of Essex. You will need to register and be logged-on to post to the forum, and you need to upload pictures first, for use in posts. Find out more