Colour-magnitude diagrams used for the selection of the member training set. The grey dots in all panels show the full catalogue. Top panels: the proper-motion-selected candidates belonging to various categories (X-ray and IR excess, OB stars, Hα spectroscopy and Hα photometry; see text for details) are overplotted. The solid line shows the 2 Myr PARSEC isochrone, and the dashed lines the selection criteria. Bottom panels: the black points show the 500 finally selected members for the training set, based on the proper motion, colour, and parallax arguments.