A LIST OF SPIDERS COLLECTED IN ARIZONA BY MESSRS. SCHWARZ AND BARBER DURING THE SUMMER OF 1901. By Nathan Banks, CHstO(li((H, Svrfi,,ll nf Anirhlliihl Duriiio-the siunnier of 1001, Mr. E. A. Schwarz uiid Mr. H. Barber collected extensively in parts of Arizona, especially in the vicinity of Williams. In the following pages is a list of the Arachnida that the}^ collected. In a previous paper^ I have reported on a collection made by Mr. Schwarz in southern Arizona. There is, however, veiy little similaritv in these two collections. The one made during the past summer contains a great man}' northern species; in fact, a large major-ity of them occur in Colorado. In this list there are recorded til spiders and 13 other arachnids, a total of 77 species. In the previous article there were 5.5 species, 87 of which are not found in this list; this makes the total number of arachnids recorded from Arizona 114. Of the spiders in this list the Attidte are represented by 13 species, the Thomisiidie by 12 species; none of the other families have more than 8 species. Three species are described as new. This material forms part of the collections of the United States National Museum. Order ARANEIDA. Family THERAPHOSID.F. EURYPELMA RUSTICUM Simon. Enrypelma rusticmn Simox, Act. Soc. Linn. Bord., XLIV, 1892, p. .32.S. One female, not quite mature, from Williams, June 2. Family FILISTATID.E. FILISTATA HIBERNALIS Hentz. Filisiata hihernalis Hentz, Journ. Bost. Soc. Nat. Hist., IV, 1S42, p. 227. A few specimens from Williams, June 10 and July 1. 'Proc. U.S. Nat. M us., XXIH, 1901, pp. 581-590. Proceedings U. S. National Museum, Vol. XXV-No. 1284. 211