Details: 

(Top)  Canon EOS 10D,  shutter 1/350 second, aperture f13, ISO 400, Canon EF 100 mm macro lens, no flash

(Bottom)  Canon EOS 10D,  shutter 1/350 second, aperture f11, ISO 400, Canon EF 100 mm macro lens, no flash

Selected References:

Brock Jim P., Kaufman Kenn. Butterflies of North America. New York: Houghton Mifflin Company, 2003. P 46-47.

Struttmann Jane M. USGS Northern Prairie Wildlife Research Center. "Cabbage White (Pieris rapae)" Butterflies of North America / Butterflies of Iowa.<http://www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/ia/778.htm > (16 Sep. 2004)