Sept., igio.] A List of Labrador Coleoptera. 175 



5. Coleoptera of the Harriman Alaska Expedition, by E. A. 

 Schwarz. 



6. Le Conte's lists of Coleoptera taken in the Hudson Bay and 

 Lake Superior regions by Dr. Bell and others, summarized by W. H. 

 Harrington in Canadian Entomologist, 1890, p. 135. 



7. Coleoptera of Michigan, by E. A. Schwarz. 



8. List of Coleoptera common to North America, Europe, and 

 Asia, by John Hamilton in Transactions American Entomological 

 Society, Vol. XVI, March, 1889. 



In addition to these printed lists, Mr. Blanchard's letters have 

 given numerous additional geographical references, and Mr. Percy 

 G. Bolster, of Boston, has kindly sent me a copy of his unpublished 

 list of about 170 species collected in Newfoundland in 1905 and 1907 

 and identified for him by Mr. Blanchard. Mr. Charles W. Leng's 

 unpublished list of Newfoundland beetles has also been at my 

 disposal. 



The records herein cited show that 12 of the 166 Labrador species 

 are known to occur in Greenland ; 93 species are known to occur on 

 Mt. Washington or elsewhere in the White Mountains of New Hamp- 

 shire; 65 species are known from Alaska; 79 species from the Hudson 

 Bay and Lake Superior regions ; only 35 species are common to Lab- 

 rador and Newfoundland; 48 species occur also in Europe and Asia, 

 while three or four may be termed cosmopolitan. 



In referring to the matter of geographical distribution, particu- 

 larly of these northern species, one recalls Mr. Schwarz's interesting 

 remarks on the circumpolar fauna,^ especially the following: "The 

 mountain ranges in America run in the direction from north to south, 

 and the colonies of circumpolar insects upon their summits have thus 

 been able to preserve their connection and specific identity with the 

 arctic forms; whereas in Europe, where the mountain ranges run 

 from east to west, the alpine colonies have generally undergone 

 changes and, by isolation, lost their specific identity with the arctic 

 species. There is, therefore, in the Old World an abundance of dis- 

 tinct alpine forms, none of which are identical with North American 

 species; while we, on our high mountains, have but few, if any, 

 alpine, but more arctic forms." 



In the absence of other authority for the Labrador localities cited 



^ Proceedings Washington Entomological Society, Vol. I, No. 4. 



