Glutophrissa drusilla is smaller than the Great Southern White (Ascia monuste) or the Cuban White (Ganyra menciae).
   They are sexually dimorphic.
   Males are pure white on both sides with a fine black edging along the costa.
   Females are white with a black border to the forewing that shows through to the ventral side. The inner edge of the black border is smooth. In some females the black border is broader and more extensive extending to black spots on the edge of the dorsal side hindwing.
   Antenna clubs are white.
   They tend to prefer canopy and hammock cover, but will occasionally venture outside in the open to nectar.
   They are active most of the year, generating 3 or 4 broods per year, with a long adult reproductive winter diapause (hibernation).
   Two or three eggs are laid on a leaf, where the caterpillars feed on the leaves they are on, and the larger caterpillars often become cannibalistic.