Earth moth

http://waynesword.palomar.edu/redmit2a.htm
the Ceanothus silkmoth, also known as hyalophora euryalus, as an egg, hatches and feeds on the California lilac (ceanothus) of which there is a profusion here at Searock. This one was huge, a wingspan of over 4 inches, although some of her relatives are even bigger.