Distribution of the corrected velocity dispersions and redshifts for lensing galaxies in the combined sample from the various surveys. The blue squares represent lenses from SLACS, the green dots represent lenses from LSD, the red down triangles represent lenses from S4TM, the purple crosses represent lenses from BELLS GALLERY, the black triangles represent lenses from SL2S, and the yellow diamonds represent lenses from BELLS.