Figures 1-3a are drawn from the mature larva of Pieri 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
MAYER. — Wing Scales, 
PLATE 1. 
rape, Figure 4, young 
pupa of Samiu cecropia, 
Section lengtliwise through the left hind wing of the mature larva of 
Pieris rapw. "Phe plane of the section is parallel to the frontal plane 
of the larva, i. e. perpendicular to its dorso-ventral axis. 
Diagrammatic reproduction of Figure 1. 
A portion of a cross section of the larval wing. 
Longitudinal section through a portion of one wall of the larval wing. 
Longitudinal section (i.e. with the trend of the nervures) through the 
pupal wings of S. cecropia. The section is taken near the lower free 
edges of tlie pupal wing cases. 
