Psilogramma increta
This particular moth is not stated to be in the US but has been introduced to Hawaii ! - you probably have some around in the US now...Looks like the correct genus - I hope I've got the species correct.
looks like the larva of a hawk moth (Sphingidae) -will research further and get back to you..
Lat: 39.64, Long: -74.65
Spotted on Jul 16, 2011
Submitted on Jan 27, 2012