THE WINGS. 



29 



boundaries of the wings ; and, unless the reader 

 makes himself acquainted with them, he will find 

 himself quite at a loss when reading the descrip- 

 tions of insects in purely scientific books. 



The accompanying diagram represents the 

 various parts of the upper and anterior wing of 

 the Moth. 



D 



Beginning with the part designated Ly the 

 capital letters, A is the anterior margin, B the 

 costal nervure, c the median nervure, D the 

 anal or posterior angle, E the posterior or interior 



