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Photo#138772
Clouded Sulphur? - Colias eurytheme

Clouded Sulphur? - Colias eurytheme
Stewartsville, Warren County, New Jersey, USA
August 17, 2007
This looks like photos of Clouded Sulphurs in the Guide.

Images of this individual: tag all
Clouded Sulphur? - Colias eurytheme Clouded Sulphur? - Colias eurytheme Clouded Sulphur? - Colias eurytheme

Moved
Moved from Clouded Sulphur.

Colias eurytheme
This is a white form female of the Orange Sulphur. The very broad dark border (showing through) and the shape of the wings are typical for C. eurytheme, and not right for C. philodice.

Moved
Moved from Butterflies.

Clouded Sulphur
You are correct in your identification as to this being a Clouded Sulphur. It's also the more rarer Albino form that only happens with females. Compare:

 
Clouded or Orange
What color was this bug dorsally? If it was a white morph female (albino is not really a good term for these bugs as they are not true albinos), then it's probably not identifiable. White females occur in both Clouded and Orange Sulphurs and, as far as I know, are not reliably separated unless in copula with a male. This bug doesn't really strike me as a white morph, though. It seems too yellow to me and looks fine for a normal female Clouded Sulphur, but who knows. Female sulphurs can be pretty darn tricky.

 
Female Clouded, I believe
The two photos of the dorsal side of the wings clearly show that the color is yellowish, not white, as in Kenneth's photo. Based on that and photos in my Butterflies of NA, I agree with Nick; it is very probably a female Clouded.

 
Dorsal View
The Sulphurs I have seen tend to keep their wings closed except when in flight. I will add the only other photo of this specimen showing part of the dorsal side. It is similar to the one originally posted.

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