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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Butterflies and Moths (Lepidoptera) » Butterflies (excluding skippers) (Papilionoidea) » Whites, Sulphurs, Yellows (Pieridae) » Whites (Pierinae) » Pontia » Western White (Pontia occidentalis)
Photo#25373
Western White - Pontia occidentalis - female
Copyright © 2005 tom murray

Western White - Pontia occidentalis - Female
Glenwood Springs, Garfield County, Colorado, USA
July 13, 2005
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Contributed by tom murray on 23 July, 2005 - 8:41pm

Pontia protodice I think
Hi Tom, The yellow coloring and general arrangement of the markings on this one make it look like a female P. protocice to me. I don't think I've ever seen P. occidentalis with yellowish markings below. Trying to separate the two species can sometimes be enough to drive anyone crazy though.
… David J. Ferguson, 15 April, 2008 - 1:32pm login or register to post comments

 
David,
I'm going by Kaufman's book (1) and the picture of P. occidentalis shows even more golden yellow than this one, and dorsally, the FW outer spots are gray in contrast to the dark inner spots.
… tom murray, 15 April, 2008 - 4:52pm login or register to post comments

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