Lamia, narrative poem in rhymed couplets by John Keats, written in 1819. - Lamia is the last of the four metrical romances written by Keats. - Its source is a short anecdote in Robert Burton's Anatomy of Melancholy that Keats appended at the end of the poem. - In the poem, Lamia and Lycius, a young man from Corinth, fall in love. - Lamia, the poem seems to say that passionate love is an illusion and an enchantment, ultimately destructive.