Proper motions for Pleiades and Taurus-Auriga members. We distinguished four cases: green solid circles for lithium detection and membership probability larger than 0.75; blue open circles for lithium upper limits and membership probability larger than 0.75; magenta solid circles for lithium detection and membership probability less than 0.75; red open circles for lithium upper limits and membership probability less than 0.75. Membership probabilities come from Bouy et al. (2015). Light gray plus symbols are used for Taurus-Auriga members (taken from Ducourant et al. 2005).