PEXDULINE TIT. 
2S 
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. sihiricus, which 
is very rarely killed south of Stockholm. P. ctjanus, 
according to Nilsson, is only found in the north of 
Sweden.” 
P. hockhariensis , 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. 
