1900.] NATURAL SCIENCES OF PHILADELPHIA. 529 SOME ARACHNIDA FROM ALABAMA. BY NATHAN BANKS. The following spiders and allied Arachnids were collected in Alabama, for the most part, by Prof. Carl F. Baker and his students. Some, however, were gathered by Prof. Baker's prede-cessor. Dr. L. M. Underwood. A few very interesting ones were taken by the late Mr. Hugo Soltau near Mobile. When no locality is given the specimens come from the vicinity of Auburn. The following students assisted in making the collections : Messrs. Allen, Dixon, Dobbin, Eppes, Farley, Houghton, McCalla, Minge, Ransom, Shevers, Stewart and Warwick from Auburn, and Hudnion from Opelika. All the localities are in the souLhern .portion of the State; collections in the hilly northern part 'would doubtless add many forms to the list, while on the Gulf coast a few semi-tropical forms would be found. The Arachnid fauna of Alabama is of much interest to the modern student since this State was one of the collecting grounds of Prof. Hentz, the father of American Arachnology. A number of species described by Hentz have been unkuown to later natu-ralists, and the systematic position of some of them in much doubt. In this collection several of these forms appear which enables me to place them in their proper position. Perhaps the most interesting of these species is the one described by Hentz as Katadysas j^umilus. Hentz believed this spider to be intermediate between the two great divisions of the Araneida — those with four lung-slits and vertically moving fangs, and those with two lung-slits and laterally moving fangs. Katadysas was reputed to have but two lung-slits, yet with vertically moving fangs. The general appearance of Hentz' figure led several writers to believe that Katadysas was a Zora or near that genus. lu this collection there is one specimen of Katadysas pumilas which proves to belong to the genus Zora, a genus new to our country. Of scarcely less interest was the scorpion, of which Prof. Baker sent me many specimens. This scorpion proves to be quite differ-
BioStor
