SOME SPIDERS AND OTHER ARACHNIDA FROM PORTO 
RICO. 
B}^ Nathan Banks, 
Custodian of Aradmida. 
This paper is based principally on material collected in Porto Rico 
b}^ Mr. August Busck, who visited that island in the early part of 1899. 
Since then some specimens have been received from several collectors 
whose names will ])c found in connection wnth the species the}^ col- 
lected. All uncredited records are those of Mr. Busck. 
This list shows a total of forty-nine spiders and live other arachnids. 
Although there are less than fifty spiders they are disposed in fifteen 
families. The Epeiridre stands first with sixteen species; no other 
family haA^ing more than four species, and four families are repre- 
sented by but one species each. There are but few small forms in the 
collection, although these are doubtless fairly common on the island. 
Two spiders and the phalangids are described as new, a few other 
species are probably new, but more material is necessary for determi- 
nation. 
Most of the species are quite widely distributed in the West Indies 
and the northern border of South America. A few species are known 
only from Porto Rico, but with larger collections from the other islands 
these forms Avill be found to occur elsew^here. Twenty of the spiders 
are known to occur in the United States, mostl}" in the extreme south- 
ern portions. This collection would indicate that the Porto Rican 
fauna is more intimately related to that of northern South America 
than to the fauna of the United States. 
The material forms part of the collection of Arachnida of the United 
States National Museum. 
Order ARANEIDA. 
Family THERAPHOSID.E. 
AVICULARIA LiETA Koch. 
Mygale Ixia Koch, Die Arach., IX, 1842, p. 66. 
Two specimens; one from Culebra Island, February 11, the other 
from Utado, January 27. Koch's figure is not good, but the scopulas, 
when dry, are plainly greenish; venter is black. A true Avicidaria. 
It was described b}^ Koch from Porto Rico. 
Proceedings U. S. National Museum, Vol. XXIV— No. 1253. 
217 
