10 Jiiillitin Anieririin Museum of Xaluntl Ili/ilory. [Vol. XXIX. 



as in the old coiiiitry and some, especially tropical forms, are cosmopolitan. 

 I.solatcd fannas lia\(' not been studied sufficiently to deserve any special 

 nicntioM in this place, although the islands of the West Indies are so near 

 this continent that it seems strange that they have not been studied more 

 thoroughly in this respect. From the works of Simon on the spiders of 

 \'enezucla and of St. \ inccnt and from my own collection of spiders from 

 Jamaica 1 draw the conclusion that Venezuelan forms, .so conuiion in St. 

 \'incent, become more and more scarce as we proceed north and give way to 

 new forms characteristic of the respective islands, while other forms begin 

 to appear, wliich are more commonly met with in Mexico and Florida. 

 But the (ecology of the different species is still entirely untouched and it 

 would be a u.seless undertaking to draw any further conclusions from the 

 few datji obtainable. 



In conclusion I desire to express my sincerest thanks to the library 

 staff of the New York Academy of Sciences and especially to Mr. I. B. 

 Sniffin who has helped me during the more than two years that this work 

 has been in progress, to correct wrong references in which the printed lists 

 abound and to find papers the titles of which had been misquoted. 



MONTCLAIR, X. J. 

 June 6, 1910. 



