Eggs take about 1 week to hatch, so diligence is key to saving the harvest. They look like little green bubbles, laid on the top or bottom of the leaves.

Photo taken July 25, 2004.

We caught this one just emerging from the egg. Obviously, it hasn't eaten much.
Photo taken July 27, 2004.

We apparently missed a couple eggs before we set out on vacation this year!
Photo taken August 23, 2004.