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Well, the brachypterous specimen is P. semialata, a female. Not previously recorded from the Netherlands.
The 'macropterous' specimens actually have much bigger wings than I remembered. That is probably due to the fact that the same sample also had some brachypterous Chloropidae of the same size and coloration (in alcohol all those lovely dust patterns on the Ephydridae are invisible). These 'macropterous' Philygria were indeed Philygria and, oddly enough, they were P. picta, precisely the other species with two pairs of dorsocentral setae and no acrostichals. Any thoughts on what the chances would be that both occur together?