ARACHNIDA. 
I.—CATALOG UES. 
No catalogue of the North American forms has so far been published. 
II.—COMPREHENSIVE WORKS. 
C. W. HAHN AND C. L. KocH.—Die Arachniden. Niirnberg, 1831—48, 
16 vols. with 563 pl. 
H. Lucas.—Descriptions et figures d’espéces nouvelles d’Arachnides. 
Paris, 1835-36. 
C. A. DE WALCKENAER.—Histoire naturelle des Insectes (Suites a Buf- 
fon). Apteres. Paris, Roret, 1837-47, 4 vols., with 52 pl. 
The first work on general classification of this order, and many North Amer- 
ican species are described from drawings by Bosc and Abbot. 
N. M. HENTZ.—Descrip tions and figures of the Araneides of the United 
States. <Journ. Boston Soc. Nat. Hist., Vol. [V-VI, 184250. 
These papers form the basis of the study of American arachnology. Numerous 
species are described, but not in synoptic form. 
T. THORELL.—On European Spiders. PartI. Review of the European 
genera of Spiders. Upsala, 1869~70. 
N. M. HEnTz.—Araneze Americe septentrionalis. The Spiders of the 
United States. Edited by J. H. Emerton and E. Burgess. <‘‘ Oc- 
casional Papers” of the Boston Society of Natural History, 1875. 
A reprint of Hentz’s papers on North American spiders. 
GRAF EUGEN KEYSERLING.--Amerikanische Spinnen aus den Fami- 
lien Pholcoide, Scytodoide und Dysderoide. <Verh. k. k. zool.- 
bot. Ges. in Wien, Vol. XX VII, 1877, pp. 205-234. 
GRAF EUGEN KEYSERLING.—Neue Spinnen aus Amerika. (Six 
parts.) <Verh. k. k. Zool.-bot. Ges. in Wien, Vols. XXIX- 
XXXIV, 1879-84. 
E. Smwon.—Les Arachnides de France. Paris, Vols. I-V, 1874—84. 
These two works represent the most recent systems of classification, and are 
therefore of great general value, although they deal only with the Euro- 
pean fauna. : 
LuciEN M. UNDERWooD.—The Progress of Arachnology in America. 
<Amer. Natur., Vol. X XI, 1887, pp. 963-975. 
A very useful review of the bibliography, with synoptic table of the families 
of the Aranee. 
rT = 
63 
