Glutophrissa drusilla, sometimes also called the Florida White or Tropical White, is a butterfly in the family Pieridae.
It is found in tropical America from Brazil north to southern Florida, and sometimes in coastal Texas.
Its wingspan is 53–77 mm.
The male's upperside of the wings is all white with a narrow black costal edge on the forewing.
The male's underside of the wings shows a yellow comma at the base of the forewing
The female's upperside is pale yellowish-white with a slightly yellow base of the hindwing, and usually she has black on the forewing tips.
The female's underside of the wings is white with yellow on the base of the forewing.

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

Brownsberg Nature Park, Suriname, 17 October 2016