Fraction of the 24 μm-driven CIB which comes from high-redshift galaxies, as defined by the IRAC color–color cut shown in Figure 7, is plotted against wavelength for the three BLAST bands and SCUBA. Overplotted are predictions from the phenomenological evolutionary model of Valiante et al. (2009), for a range of redshift cuts. The solid, dashed, and dash-dotted curves are for a 24 μm catalog complete above S ₂₄ = 30 μJy. The dotted curve shows how the z _c = 1.4 curve changes for a S ₂₄ ⩾ 10 μJy catalog. z _c = 1.2 is clearly not a good fit to the data. We hypothesize that our estimate of z _c corresponding to the redshift cut of Section 4.2 is biased low due to selection effects. Note that the BLAST uncertainties are highly correlated (Table 1).