What is Lycia cognataria Guenee (Geometridae) in Holland's "The Moth Book"?

[caterpillar]

Thank you to all who answered me personally.  Lycia cognataria in
Holland's book is indeed the same as Biston betularia (ssp.
cognataria).

 
 ------------------------------------------------------------ 

   For subscription and related information about LEPS-L visit:

   http://www.peabody.yale.edu/other/lepsl