A photographic test key by Rowson & Pavett (2008) is available via the BWARS website. Else and Edwards cover Coelioxys in their new book Handbook of the Bees of the British Isles, which is due for publication soon.
There is a single British record of Coelioxys afra from the New Forest, South Hants (1892). This record is thought to be a vagrant or introduction. The only other records are from Guernsey in the Channel Islands (Rowson & Pavett, 2008).
In Europe it is found from Spain to Lithuania and Italy to Belgium, it has also been recorded from the Greek mainland. It is mainly recorded from European countries with coastline. Further afield, it occurs as far as Oman (Else, in prep.).