1a. Should be correct as P. omaha.
1b Probably P. ganda variant.
Confirmation: Male P. ganda. Note HW marginal zone not crossed by significantly darken veins as in P. omaha.
The typical forms of both species are identifiable but intermediates & crosses exist.
P. omaha. Dull ochreous, veins more distinctly dark dusted.
https://i1097.photobucket.com/albums.../RIMG26722.jpg
http://www.butterflycircle.com/check...obby%20Mun.jpg
https://a4.pbase.com/g4/25/686825/2/...1.Buz1tBHC.jpg
http://www.butterflycircle.com/check...se_site_01.jpg
https://en.wikipedia.org/wiki/Potant..._Singapore.JPG
http://4.bp.blogspot.com/-4O8gFkmT2t...28TBC%2529.jpg
https://inaturalist-open-data.s3.ama.../original.jpeg
P. ganda. More orangey ;Veins typically not dark dusted , generally heavier shading.
https://inaturalist-open-data.s3.ama.../original.jpeg
https://2.bp.blogspot.com/-r1T4ajMPu...25286%2529.jpg
https://farm2.staticflickr.com/1337/...ac5c42d89d.jpg
https://2.bp.blogspot.com/-Ht4NZzQND..._underside.jpg
https://2.bp.blogspot.com/-dEQvLGTcj...lt_BTVC_01.jpg
https://static.inaturalist.org/photo...7/original.jpg
https://inaturalist-open-data.s3.ama...5/original.jpg
Intermediate . More lightly P. ganda.
http://4.bp.blogspot.com/-L3ew9ztkIk...thus-ganda.jpg