FLIGHT OF INSECTS. 



355 



those which they display when seen by reflected 

 light. 



The forms of these scales are exceedingly di- 

 versified, not only in different species, but also 

 in different parts of the wings and body of the 

 same insect ; for the surface of the body, gene- 

 rally, as well as the limbs, and even in some spe- 

 cies the antennae are more or less covered 

 with these scales.* Fig. 164 exhibits some of 



the more usual shapes as they appear when 

 viewed with high magnifying powers. 



Each scale is inserted into the membrane of 

 the wing by a short pedicle, or root, and over- 



* In the posthumous work of Lyonet, which has lately ap- 

 peared, nearly the whole of six quarto plates are crowded with 

 the delineations of the different forms of the scales found in the 

 Bombyx Cossus. 



