Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ptĕrŏphŏros, i, f., = πτεροφόρος (winged), a country near the Riphœan Mountains, Plin. 4, 12, 26, § 88.
Hence, Ptĕrŏphŏrītae, ārum, m., the inhabitants of Pterophoros, Mel. 1, 2.