Hypopyra vespertilio

MOT vol 3, pl 25/3-4, pg 101.
Hampson vol 2, pg 554 as Spirama vespertilio.
http://www.jpmoth.org/Noctuidae/Catocalinae/Hypopyra_vespertilio.html. Good match for the underside as well. However, I don’t have ossigera underside to compare.
https://en.wikipedia.org/wiki/Hypopyra_vespertilio
Similar species in Hampson is Spirama unistrigata, which has pale straight submarginal lines, which this lacks.
Similar species: Hypopyra ossigera. Roger Kendrick states that if yellow-orange below, then ossigera, if red then vespertillo.
https://www.inaturalist.org/taxa/357305-Hypopyra-ossigera/browse_photos
http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=456233
http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=560871