A new species ofMegaselia(Diptera, Phoridae) whose larvae prey upon the eggs ofLeptodactylus fuscus(Anura, Leptodactylidae)

Megaselia nidanurae Disney sp. nov. is described from a series of males and females reared from larvae preying on the eggs of the foam-nesting frog Leptodactylus fuscus (Schneider) in Trinidad. The general biology of the association suggests that this is an obligate relationship for the fly. This is the first description of a ‘frogfly’ attacking foam-nests hidden in burrows.