Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
A downloadable PDF file with extensive data on habitats, hostplants, flight dates, and range in the Carolinas. You must give an e-mail address to reach the download--the authors want to inform you of updates. (This is produced by the North Carolina Wildlife Resources Commission, a state agency.)

(I thought I had posted this before, but cannot find it.)
http://www.ncsparks.net/butterfly/nbnc.html