The Great Mormon females f-esperi that are found in Singapore tend to have extensive white on the forewings as compared to the Malaysian forms. I've discussed this earlier on some thread. This is a phenomenon that appears rather consistently amongst the examples that we see here.

The model for the female f-esperi to mimic, Atrophaneura nox, is no longer found in Singapore, and this could be one of the reasons why any form of aposematic mimicry is no longer effective for this species.