Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Melpŏmĕnē, ēs, f., Μελπομένη (the songstress), the muse of tragic and lyric poetry: Melpomene, cui liquidam pater Vocem cum citharā dedit, Hor. C. 1, 24, 3; Mart. 4, 37, 1; Aus. Idyll. 20, 2.