12 



New York State College of Forestry 



choke cherry (Prunus virginiana L.), Pyr^ns arhutifolia and P. 

 melanocarpa (Michx.) Willd. Two wet-land grasses (Avena Tor- 

 reyi Nash and Oryzopsis asperifolia Michx.), the abundance of 

 creeping blackberry {Rubus hispidiis L.) and two species of 

 Spiranthes (growing among the wet-land grasses) tend to empha- 

 size the hydrophytic aspect of the plains. Extreme areas are 

 covered with reindeer moss which reaches its optimum development 

 during the autumn months. Here and there golden rods, asters 

 and spiraea are found among the shrubs and have a conspicuous 

 place in the flora of late summer. 



Fig. 7. — Big Floating Island; photo taken near the island by 

 Osborn. See description of Station Number 7. 



PALAEARCTIC HEMIPTERA OCCURRING IN THE CRAN= 

 BERRY LAKE REGION 



Horvath* very carefully studied and collated the genera and 

 species of Hemiptera, known to occur in both Europe and America, 

 especially those of the Palaearctic and Nearctic regions. He pre- 

 sents evidences to show that many of the species common to both 

 faunas are of Palaearctic origin and that migration took place 

 largely in an eastward direction by the way of Alaska. Many 

 of the species known to occur in both regions have only been taken 

 in eastern and northeastern localities of the United States and 

 Eastern Canada. Although this is not in perfect accord with some 

 of Horvath 's theories and evidences, more collecting in the western 

 regions of the United States and Canada will undoubtedly extend 

 the range westward for many of the Palaearctic Hemiptera that 

 have become permanently established in North America. Parshley t 



* Horvdth, G. Les relations entre les faunes h^mipt^rologiques de 1' Europe et 

 de I'Am^rique du Nord, Ann. Hist. Nat. Mus. Nat. Hung., Budapest, 1908. 



t Parshley, H. M. Fauna of New England. List of Hem.-Het. Occasional Papers 

 Bos. Soc. Nat. Hist., VII, 1917. 



