INSECTS. 



493 



fied representations of a few of them. No. 1 is a scale of 

 the Morpho menelaus, taken from the side of the wing, of a 



Fig. 248. Scales from Butterflies' and Moths' wings. (Magnified 200 diameters.) 



1, Scale of Morpho Menelaus. 2, Large Scale of Polyommatus Argiolus, azure 

 blue. 3, Hipparchia Janira Argiolus. 4, Poniia Brassica. 5, Podura 

 Plumbea. 6, Small Scale of Azure Blue. 



pale-blue colour: it measures about l-120th of an inch in 

 length, and exhibits a series of longitudinal stripes or lines, 

 between which are disposed cross-lines or striae, giving it 

 the appearance of brick- work. The microscope should be 

 enabled to make out these markings with the spaces 

 between them clear and distinct, as shown in fig. 249, 

 No. la. 



Polyommatus argiolus, Azure-blue, Nos. 2 and 6, are 

 large and small scales taken from the under-side of the 

 wing of this beautiful blue butterfly; the small scale is 

 covered with a series of spots, and exhibits both longitu- 



