Phormia regina

Phor·mi·a re·gi·na

(fōr'mē-ă rĕ-jī'nă), The black blowfly, the larvae of which were formerly used in the treatment of septic wounds because they secrete a proteolytic enzyme that aids in the removal of dead tissue; it is a frequent cause of maggot infestation of sheep, depositing eggs in the wool, and is a widely distributed cold weather species that lays its eggs on dead or decaying tissues.