After looking at a pic of a valid O. goloides I am wondering whether pic 3 is that of O. goloides.
In particular, apart from the darkened veins(thought to be due to abrasion) the forewing periphery is very dark.
Here is a valid O. goloides female with upper for confirmation.
http://www.flickr.com/photos/drsaji/3973933054/
Compare with pic 3 , and pic 4 which is typical O. gola female.

It looks like O. goloides is also present in Singapore.
Federik's pic in Bah Soon Pah 2010. Note lightly darkened veins & dark periphery of forewing.
http://3.bp.blogspot.com/_0EK80AsaR7...+pseudolus.jpg

Federick's pic of O. gola. Also see pics in checklist.
http://2.bp.blogspot.com/-ZS8iBAj_w4...%2BDartlet.jpg

TL Seow