PLATE X. 



SCALES FROM BUTTERFLIES' WINGS, ETC. 



1. Scale of Morpho Menelaus, magnified 250 diameters, la. Portion of Scale of Morpho Menelaus, magni- 

 fied 500 diameters. 2. Large Scale of Polyommatus Argiolus, azure blue, magnified 250 diameters. 

 3. Hipparchia Janira, magnified 250 diameters. 4. Pontia Brassica, magnified 250 diameters. 5. Podura 

 Plumbea, magnified 250 diameters. 5n. Portion of Large Scale of Podura Plumbea, magnified 500 

 diameters. 6. Small Scale of Azure Blue, magnified 250 diameters. 7. Scale from the Wing of Gnat, 

 magnified 500 diameters. 8. Portion of a Large Scale of Lepisma Saccharine, magnified 500 diameters. 



