1. Egg, 0.3 mm.
2. First instar nymph, 0.8-0.9 mm.
3. Second instar nymph, 1.2-1.7 mm.
4. Third instar nymph, 2.0-2.5 mm.
5. Fourth instar nymph, 2.5-3.0 mm.
6. Fifth instar nymph, 3.0-5.0 mm.
These drawings are by Philip Garman and were first published in the Annals of the Entomological Society of America.There are photos of this species on the main Clastoptera obtusa page.