Same as Fig. 13 (our data are shown in the corresponding black symbols for clarity), but with various evolutionary models overplotted. In red solid lines are the André et al. (2008) tracks for final stellar masses of 1, 3, 8, 15, and 50 M_⊙ (left to right). The Saraceno et al. (1996) tracks for initial masses of 0.5, 1, 2, and 4 M_⊙ are shown in blue dashed lines, and the Molinari et al. (2008) tracks for initial envelope masses 80, 140, 350, 700, and 2000 M_⊙ are shown in green dashed-dotted lines. The diagonal lines are the same loci fitting the Class I-like sources (gray dashed and solid) and “MM”, Class 0-like soures (dashed black) as in Fig. 13.