It is my contention in this paper that Spenser's Muiopotmos is an allegory of the life and death of Sir Philip Sidney much like Astrophel. My reasons, in brief, are the following. The two poems tell fundamentally the same tale. The symbolical meaning of the butterfly is peculiarly suited to Sidney. The episode of Astery favors the supposition that it alludes to Stella. The departures from classical authority noticeable in the episode of Arachne combine to allegorize an important event in Sidney's life.