Rutilia is a large genus of medium to large (>20mm) flies in the family Tachinidae native to Australia and the Oriental region, though notably absent from New Zealand.

[3][4][5] Like the vast majority of tachinid flies, Rutilia species are parasitoids of other insects, specifically Rutilia are known to be parasitoids of late instar larvae of scarab beetles.

Rutilia is a large genus comprising seven subgenera.