I remembered Judy Burris' book "The Life Cycles of Butterflies: From Egg to Maturity, A Visual Guide to 23 Common Garden Butterflis" has the RA life cycle in it.
She says the eggs are green, barrel-like and laid one at a time on the topmost tender leaves of their host plants. The photos in her book look very similar to the shape and color of fresh guava skipper eggs - so that gives me an excellent reference point - now I know what to look for!!!
Which, by the way, I looked over some pellitory and didn't find any eggs...grrrr!!! But there is just too much of that stuff growing wild in my yard.
~ Cat