PENDULlkE TIT. 23 



and only accidental in Denmark. They say Palustris 

 goes as far north as the birch grows. It is, however, 

 certainly very rare here, for all I kill are Borealis. 

 The further north we go after passing Gefa, the less 

 common it becomes, being replaced by P. sibiricus, which 

 is very rarely killed south of Stockholm. P. cyaniis, 

 according to Nilsson, is only found in the north of 

 Sweden." 



P. bockhariensis , Brehm, is said to be occasionally 

 seen in the north of Europe; but I believe there is no 

 good authority for its introduction into the European 

 list. 



