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Very many thanks indeed to you both. As indicated I do have the specimen of this and the other two and if nobody else asks for them I might offer them to NHM if they are interested.

I am amazed that this one has evoked so much comment and is +/- identified whereas the hoverfly , which I had tentatively identiied has had no response and the Ulidiid just Paul's initial confirmation of the family. I had anticipated I mught not get any replies at all.

Thank you both again.

Alan