Mayer. — Wing Scales, 
PLATE 1. 
Figures 1-3a are drawn from the mature larva of Pieris rape. Figure 4, young 
pupa of Samia cecropia. 
Fig. 1. Section lengthwise through the left hind wing of the mature larva of 
Pieris rape. The plane of the section is parallel to the frontal plane 
of the larva, i. e. perpendicular to its dorso-ventral axis. 
2. Diagrammatic reproduction of Figure 1. 
5. A portion of a cross section of the larval wing. 
Fig. 83a. Longitudinal section through a portion of one wall of the larval wing. 
4. Longitudinal seetion (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 the pupal wing cases. 
a 
