198 ENTOMOLOGICAL SOCIETY 



Fam. 



Heliophanes auratus, C. K. Siberia, L. Koch, 10. 



Attus rubicola, C. K. Siberia, 61, 50, L. Koch, 10. 



tereoratus, Clk. Lapland, Nordmann, 4. 



" Clk. Greenland, Muller, 2. 



Hasarius falcatus, Clk. Norway, Simon, 12. 



Epiblemum scenicum, Clk. Lapland, Nordmann, 4. 



" Clk. Greenland, Muller, 2. 



*Epiblemum.scenicum, Clk. Labrador, Marx, 25. 



*Phiddipus morsitans, Walck. Labrador, Marx, 25. 



The results of a close study of the polar spider fauna of 

 both hemispheres can be summarized as follows : 



1. The arctic spider fauna is composed of the ten families 

 which we may term the common ones, their species constituting" 

 the main bulk of the entire spider fauna of the world. They 

 are cosmopolitans, and are found almost wherever animal life 

 is possible. 



2. The genera of the arctic spider fauna are, without excep 

 tion, those which also occur in other regions of the world, and 

 there has been found so far not one genus which is original to 

 that zone of eternal ice and snow. This is a very remarkable 

 fact, since in all other Arthropod orders and those of higher 

 rank the polar fauna is distinguished by special and peculiar 

 forms. 



3. Even among the species a vast number occur which live 

 in milder climates and under entirely different conditions and 

 influences, and we find some families represented by only such 

 forms, lacking entirely original arctic species. 



4. The differences between the faunas of the Eastern and 

 Western Hemispheres are slight, and generally speaking, those 

 forms which are the most frequently represented in the one are 

 also found in the larger proportion in the other. 



Another question, however, arises in connection with the 

 study of the arctic life of spiders, namely : What are the 

 influences which enable these species to endure and overcome 

 such severe conditions as an arctic winter of ten months' dura 

 tion with a temperature at which all organic life under other 

 circumstances would perish ? The answer would be, the ability 

 to accommodate their habits to those circumstances. 



Although we know very little of the life habits of the Spiders 

 in the polar region, we can infer from the few points known to 

 us that such is the fact. 



Prof. Nordenskiold informs us, that the arctic spiders live in 

 colonies under stones or other protected places. This fact has 

 however also been observed in the high Alpine regions near 



