It has been pointed out that I gave the wrong website address for my = website sorry ! the correct one should be below Francis Dr Francis Gilbert School of Life & Environmental Sciences Nottingham University, Nottingham NG72RD, UK Tel 0115-951-3215 Fax 3251 Website http://www.nottingham.ac.uk/~plzfg Syrphid Email Discussion http://lists.nottingham.ac.uk/mailman/listinfo/syr= phidae