Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Psōphis, ī̆dis, f., = Ψωφίς, a city in Arcadia, west of the chain of Erymanthus, now Tripotamo, Mel. 2, 3, 5; Plin. 4, 6, 10, § 20; Ov. M. 5, 607; Stat. Th. 4, 296.
Hence, Psōphidĭus, a, um, adj., of or belonging to Psophis, Plin. 7, 46, 47, § 151; Val. Max. 7, 1, 2.