Estimation of pupal size by modeling as a parabola. Shape of the Ampulex compressa pupa is a prolate spheroid. Thus, volume of the cocoon can be estimated by modeling it as parabola, rotated about the longitudinal axis, using only length and width measurements.

Part of: Arvidson R, Landa V, Frankenberg S, Adams ME (2018) Life History of the Emerald Jewel Wasp Ampulex compressa. Journal of Hymenoptera Research 63: 1-13. https://doi.org/10.3897/jhr.63.21762