Fraction of pixels in each mid-IR categorization (mIRd, mIRn, mIRb) as a function of column density cutoff for the ℓ = 30° (top) and ℓ = 59° (bottom) fields. In the ℓ = 30° field, as the column density cutoff is increased, the mIRd pixels become much more prevalent, replacing the common, but low-significance mIRn pixels, whereas in the ℓ = 59° field, the mIRb pixels become more prevalanet as the mIRn contribution lowers. We conclude that in the ℓ = 30° field, about 55% of the far-IR sources are mIRd, 20% are mIRn, and 25% are mIRb, while in the ℓ = 59° field, about 20% are mIRd, 40% are mIRn, and 40% are mIRb. It is evident from these plots, however, that these numbers are somewhat subjective and can vary depending on the cutoff selected.