190 Dr. A. Jefferis Turner's Observations on Cossidae. 



most, of the genera. This is a striking instance of parallel 

 involution in independent groups. 



(7) The peripheral veins are partly or wholly coalesced 

 to some extent in nearly all families. In the Cossidae this 

 does not proceed beyond partial coalescence (stalking). 



Other instances might be mentioned, but these are 

 sufficient. 



