Normalized indices of Hα emission, ﹩R_{\mathrm{H}\,\alpha }﹩, vs. dereddened B−V color for (a) the Pleiades (from Paper IV), (b) NGC 6475 (from James & Jeffries 1997), and (c) M34. The vertical dotted lines for two Pleiades stars connect maximum and minimum estimates of ﹩R_{\mathrm{H}\,\alpha }﹩ for those two stars because both show evidence of emission over the full breadth of the profile, not just in the core of Hα (see Paper IV). There are five stars in the Pleiades and five in M34 that exhibit Hα emission that rises above the continuum and their points are overlaid with crosses.