Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
The Connecticut Butterfly Atlas
By Jane E. O'Donnell, Lawrence F. Gall, and David L. Wagner
Connecticut Department of Environmental Protection, 2007
ISBN: 0-942081-16-1
Cite: 221869 with citation markup [cite:221869]
Contains information on all butterflies found in Connecticut. Including descriptions of all life stages (egg, caterpillar, chrysalis, adult) with many photos as well as hostplant, distribution, and flight season information.

Should be very useful for most of the northeast.

Available from CT DEP Store