NOMENCLATURE OF HIE PARTS OF THE WING. 61 



The veins may for conciseness, as in our "Key to the 

 Groups/^ be numbered from above downward from to 5 

 as in their explanation above, and their branches may be 

 further indicated by adding to the number one which shall 

 designate whether it is the first branch, second branch, etc., 

 and also whether it is thrown off from the upper or under 

 edge. Thus the branches striking the margin of the fore 

 wing in the above figure, beginning above, would have tliis 

 consecutive designation : 1, 2', 2% 2', 2', 2, 2,, 2^, Sg, 3„, 3,, 4 

 (the internal running into the submedian) ; while those of 

 the hind wing (including the postcostal, which does not 

 quite reach the margin) would be : 0, 1, 2', 2^^, 2", 83 , S^ , 3^ , 4, 

 5. In this way equivalent nervules of the two wings, or of 

 the same wings in different butterflies, would have a similar 

 symbol. 



