Roger, Slamka's Pyraloidea of Europe Vol 1 says Pyralis manihotalis has a ws of 24-37mm, male smaller than female. The larvae feed on animal detritus,
has also been reared on bat guano!! Its European distribution is only 2 records, 1 from the the Canary Islands (originally confused with Endotricha rogenhoferi !!)
and 1 from Dundee (larvae) in 1943 in produce imported from India. Its global distribution is given as Tropics, Far East, Japan, Pacific Islands, USA (Florida). I was
amused that it states: Unmistakeable, no confusion species. The plate of the male is of a Malaysian specimen taken by Kevin Tuck. As the ws is 20mm at 1.5x
normal size, this indicates the true ws ought to be about 14mm so my moth is still on the small side. The text quoted ws appears to be inaccurate.