SOME SPIDERS AND OTHER ARACHNIDA FROM SOUTH- 

 ERN ARIZONA. 



By Nathan Banks, 



Custodian, Section of Araehnida. 



Hardly anything is known regarding the spiders of Arizona. 

 Count Keyserling described a few species from the Marx collection, 

 and in recent years Simon has described several curious forms col- 

 lected, doubtless, by Morrison. Dr. McCook, in his American 

 Spiders, records a few species of Epeiridte from this region. Arizona 

 is especially interesting for two reasons: first, because of its prox- 

 imity to Mexico, and second, because the isolated mountainous regions 

 give rise to many local faunas. 



In the collection made by Mr. E. A. Schwarz there are 55 species— 

 43 spiders and 12 other arachnids. Eight species are described as 

 new. Five species, namely, Sparassus minax, Misumena pallida, Mis- 

 umena fidelis, Oxyopeidon molestmn, and Ammofreeha penlmHlana, 

 have not previously been recorded north of the Mexican boundary.' 

 About twenty of the spiders are of rather general distribution in the 

 United States, at least in the southern portions. Most of the others 

 are more or less restricted in their range, and about thirteen of the 

 spiders are known only from Arizona. Only one species, PhUodro- 

 nius aureolm, also occurs in Europe. 



ARANEIDA. 

 Family THERAPHOSID.E. 



EURYPELMA HENTZI (Girardt. 



Male and female from Oracle, in July. Young, apparently of this 

 species, from Santa Rita Mountains, May. 



Family SCYTODID^. 



PLECTREURYS TRISTIS Simon. 



One from Catalina Springs, April. A rather rare spider. 



Proceedings U. S. National Museum, Vol. XXIII— No 1223 



581 



