1804 Perizoma bifaciata (Barred Rivulet)

Geometridae, Larentiinae - Wingspan: 18-22mm.

A small species which is considered "locally occurring" in the UK, more likely to be seen towards the south. It does appear across Cornwall, but only rarely, with records tending towards the west of the county.

The flight season for this species appears to be July and August, but the number of records available makes it impossible to define any maximum time.