ARACHNIDA 53 



Admestina insularis i 



Charinus insularis 8 



Amfnotrecha solitaria i 



Pseudoscorpions (two species ) 8 



Afnblyotnma pilosu?n 49 



Arg-as transversa i 



Tyroglyphus sp 3 



Total 227 



It thus appears that, though only fourteen species are com- 

 mon to the Central American region, as against thirty found 

 only in the Galapagos, the Central American species are repre- 

 sented by nearly twice as many specimens. Moreover, some of 

 the species confined to the Galapagos are very closely allied to 

 species from the Central American region. For example, the 

 Olios galapagoensis is very close to O . fascictilatus from Mexico 

 and the southwestern United States. Excepting Charinus (an 

 Asiatic genus), and Coryssocnemis (a Brazilian genus), the genera 

 of the Galapagos species are all represented in the Central Amer- 

 ican region. Again, when we compare the distribution on the 

 Galapagos Islands of the commoner species we find that the 

 species from the Central American region are the most widely 

 distributed, as will be seen by the following tables : 



Species represented by more than ten specimens are distributed as 

 follows : 



Conjined to Galapagos. 

 Amblyo77ima : all from Albemarle except one from Narboro. 

 Tetragnatha : Albemarle, Narboro. 

 Lathrodectes : Bindloe, Tower, Charles, Chatham. 

 Olios: Narboro, Albemarle, Chatham. 



Gasteraca7itha : James, Charles, Chatham, Narboro, Albemarle. 

 Loxosceles : Albemarle, Hood. 



Known fro7n Central ATnerican Region. 



TheridiuTn : Albemarle, James, Narboro. 



Argyroepeira : Albemarle, James, Narboro. 



Argiope: Albemarle, James, Narboro, Charles, Hood, Bindloe, 

 Harrington, Indefatigable. 



Epeira pro77ipta : Albemarle, James, Narboro. 



Epeira oaxensis : Albemarle, James, Charles, Chatham, Hood, 

 Duncan, Barrington, Indefatigable. 



