[X/Fe] vs. [Fe/H] for the α-elements Mg, Si, Ca, and Ti: open diamonds represent the thin disc data (González Hernández et al. 2010), black upward-pointing filled triangles represent Hyades cluster data (Paulson et al. 2003), red diamonds are our stars compatible to within 1-rms with the Fe abundance but not for all elements, blue squares and blue starred symbols are the candidates selected to become members of the Hyades Supercluster (see Figs. 8, A.4, A.5, and A.6). Green downward-pointing triangles show no compatible stars. BZ Cet, V683 Per, and ϵ Tau Hyades cluster members stars are marked with orange circles. Starred points represent the giant stars. Black asterisks are the candidates selected by De Silva et al. (2011) and black crosses represent the members selected by Pompéia et al. (2011).