It means he catches or eats flies. It is the epithet of the scientific name of a carnivorous plant, called drosera, dionea or flycatcher venus. Its scientific name is Dionaea muscipula and belongs to the family Droseraceae.
Muscypula : Plant of ramoso and reddish stem, known by the name of fly parrot because of its smelly flowers, in whose corolla there is a viscous matter in which numerous insects are imprisoned.