Description
The black-veined white has a wingspan of 51 to 70 mm (2.0 to 2.8 in).[3][5] Females are commonly larger than males. The upperside of both forewings and hindwings is a translucent white boldly veined with black.[3] The underside is similar in the male but the female has brown veining. Moreover, the female loses most of her scales by rubbing her wings together, resulting almost-transparent.[4]
This butterfly can be distinguished from other members of white butterflies of the genus Pieris by its distinctive veined wings.[3]
The eggs are yellow at first, darkening with age. The caterpillars are greenish grey with transverse banding. The pupa is creamy white, marked with black, attached by a silken girdle to a twig.