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We have observed three extended sources of the infrared emission features associated with polycyclic aromatic hydrocarbons (PAHs), using a 128$\times$128 InSb array mounted on the 1.5 m NASA/Steward telescope on Mt. Lemmon. We used a CVF (1.5\% bandpass) to isolate the emission from the 3.29 and 3.40 $\mu$m PAH features in NGC 1333 \#3, Sharpless 106, and the Orion Bar. In all three sources, the 3.29 and 3.40 $\mu$m emission features arise from the same regions, but show decidedly different structure. We are analyzing the images to determine the relationship of the 3.40 $\mu$m feature to the main feature at 3.29 $\mu$m. The 3.40 $\mu$m feature may be a vibrational overtone of the 3.29 $\mu$m feature, or it may arise from attached molecular sidegroups.
