HI Jody et al.:
I recommend this publication:

http://www.fs.fed.us/foresthealth/technology/pdfs/FHTET_03_11.pdf

It's a large file (7.83 MB) so it may take time to download! The
Polyphemus Moth is on page 255 (or 258 depending on your page counter).

sincerely
--

Ian Paulsen
Bainbridge Island, WA, USA
Visit my BIRDBOOKER REPORT blog here:
http://birdbookerreport.blogspot.com/