1978] 
Shapiro — Pierid Butterflies 
279 
Fig. 2. Examples of redundant mechanisms in phenotypic induction. Ventral 
surfaces of males of Pieris protodice (left) and Colias eury theme (right). Top: estival 
phenotypes, 24 L:0 D, 25° C, pupa unchilled. Center: vernal, same conditions, young 
pupa chilled. Bottom: vernal, 10L: 14D, 25° C, pupa unchilled. 
