30 THE WINGS, 



margin, f the discoidal cell, a the anterior angle, 

 H the outer or exterior angle, i the subcostal 

 nervure. 



!N"ext we come to those divisions which are 

 designated by figures. 



1 is the sub-median nervure ; 2, the first me^ 

 dian nervure; 3, second ditto; 4, third ditto; 5 and 

 6 are the discoidal nervures ; 7, 8, 9, 10, 11, the 

 subcostal nervures; 12, the disco-cellular nervule; 

 13, the middle ditto; and 14, the lower ditto. 



The second diagram represents the correspond- 

 ing divisions of the lower or posterior wings. 



In the diagram, a is the outer or posterior 

 margin, h the anal or posterior angle, c the an- 

 terior angle, d the anterior margin, e the abdo- 

 minal margin, and/ the discoidal cell. Taking 

 the parts represented by figures, 1 is the sub- 

 median nervure; 2, 3, 4, the median nervules; 

 5, the discoidal nervure ; and 6, 7, 8, the sub- 

 costal nervules. 



These seem rather crabbed terms, and difficult 

 to learn, but they are soon mastered, and a 

 knowledge of them is absolutely necessary to the 

 entomologist. The best way of learning them is 

 to take three or four different Moths, and by the 

 ifiid of the diagram A to trace- the different parts. 

 At first this will seem rather difficult, as the ner- 



