Comparison of the Li abundances with the theoretical models of Siess et al. (2000). The curves show the Li abundance for stars with solar metallicity at the main sequence as a function of effective temperatures. Five different ages are shown: 1 and 10 Myr as black solid curves, 50 Myr as a red dotted curve, 125 Myr as a green short-dashed curve, and 600 Myr as a blue long-dashed curve. In addition to the stars of IC 2391, blue open squares, and IC 2602, red open circles (IC 2602), we show two stars from the Hyades as green starred symbols.