THE WINGS OF LEPIDOPTERA 



337 



accordance with the plan adopted in the discussion of hymenopterous wings, 

 where frequently a compotind vein is designated merely by the term indi- 

 cating its most obvious element, in order to avoid the use of a more oimber- 



Fig. 346. — Fore wing of Anosia. 



some terminolog}-. In this chapter, I have used the complete designation 

 M4+CU1 in the few cases where I wish to indicate my conclusion regarding 



3dA 

 Fig. 347. — Hind wing of Anosia. 



the fate of vein M4 in the Lepidoptera; but ordinarily it is designated as 

 vein Cui. 



The atrophy of the main stem of media. — In a few families, as for 

 example in the Cossidae (Fig. 343) and the Psychidae (Fig. 338) the main 



