I have had a quick look at this and concur with Charles R that the current name appears to be Metalype fragilis (Pictet, 1834) [this according to the Trichoptera World Checklist http://entweb.clemson.edu/, rather than ITIS or FaEu (both of which are known to contain errors - as does the Dictionary :o]
I see that neither name apperas on the UKBAP list.
Just to keep everybody happy, I shall add Psychomyia fragilis to the Dictionary, as a synonym of Metalype fragilis.
The Dictionary is of course online http://www.nhm.ac.uk/nbn. The website is being completely rebuilt this year, so I shall take onboard your comment about being able to add synonyms yourself - up until then just do so via this forum, or the feeback form on the Species Dictionary website - even with 'instant' submission to the Dictionary, it will still take a while for additions to filter through to Recorder users.
Regards,
Charles Hussey
NBN Species Dictionary Project Manager (Retired!)