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Colias eurytheme
Pieridae, Coliadinae, Colias sp. and probably Colias eurytheme, not always easy to separate it from Colias philodice.
http://bugguide.net/node/view/3248
http://bugguide.net/node/view/730204/bgi...
http://bugguide.net/node/view/765233/bgi...
http://bugguide.net/node/view/627048/bgp...
In some European species you need DNA for being on the safe side of an ID.