Common Melwhite?

Or is it another type of White? Yellow? Sulphur? You butterfly enthusiasts, especially in Costa Rica, let me know if you know for sure. It was in my garden in Atenas this morning. The closest match in my Swift Guide is the Common Melwhite (though the yellow-white color placement seems a little different), while the flying photo looks a little bit like the White-angled Sulphur, the yellow is greatly different and it doesn’t have the four brown spots, eliminating that option. For now I’m sticking with Common Melwhite (Melete lycimnia isandra) (Butterflies of America link). Whew! Butterfly ID is hard sometimes! 🙂