TYC 3251-581-1 is indicated as a red star in the BaSTI tracks with metallicity Z = 0.014 (Pietrinferni et al. 2004), and the magenta star is the star HD 77361 (Kumar & Reddy 2009). The Charbonnel & Balachandran (2000) sample with [Fe/H = –0.46 ~ 0.10 dex isdenoted as the blue triangles, while the magenta points show the Kumar et al. (2011) sample with metallicitiesranging from –0.27 to 0.18 dex. The location of the RGB bump is indicated by the red bold line at each track.