The Apricot Sulphur (Phoebis argante) has a wingspan of about 54–67 mm.
The uppersides of the male's wings are bright orange with a thin black or dark brown border on the forewings.
The hindwings are slightly paler and have two small whitish spots in the middle.
The basic colour of the females vary from white to yellow, with dark borders.
This is the subspecies Phoebis argante argante.

Andrew Neild, author of The Butterflies of Venezuela and a recognized authority on Neotropical butterflies, helped me identifying this species.

Parque Naturel Laguna del Tigre, Petén, Guatemala, 20 January 2020