Identificaciones de pdegennaro

Good ID. The Checkered White and the Spring White do look remarkably similar,but the flight period for the Spring White is pretty much over. It is a female Checkered White which has a lot more markings than the male. The under hindwing markings are different between the female Checkered and the Spring with the Checkered having a number of connected outward facing arrowheads on the margin. (From Fred Heath)