I originally thought this poor worn out butterfly was a Labrador Sulphur...til I saw it's range. So I went through all the pics of Sulphurs again and finally found a pic of a "White Form" of an Orange (Alfalfa) Sulphur. According to the field guide I have...they aren't that common to see.




Susan Louise
from Branford CT/ live in Lincoln NE
Zone 5

I looked through my field guide, and I agree that you've got a white form female orange sulphur. Very pretty, Susan!

Sherry

A few years ago I came upon a huge outbreak of Orange Sulphur in flowering bushes at a freshwater marsh edge. The nearby clover heavy pastureland had produced thousands of individuals and I was surprised by how many of the white form was in the "flock?". A coldish June set back the butterfly season in New Jersey and only in the past fews weeks have things begun to roll.