PROCEEDINGS OF THE NATIONAL MUSEUM, 497 



CATALOGUE OF THE DESCRIBED ARANE^E OF TEMPERATE 

 NORTH AMERICA.* 



BY 



Dr. George Marx. 



INTRODUCTION. 



During the last few years I have prepared for my private use a card 

 catalogue of the Aranere of temperate North America as described by 

 both American and European authors. I derive constantly so much 

 benefit from this work that, with the thought that it will be equally 

 useful for my colaborers in American arachnology, I herewith present 

 it in the form of a catalogue. 



In the arrangement of the families I have adopted Professor Thorell's 

 new system as offered in his important work, " On Dr. Bertkau's 

 Classification of the Order Aranese " (Annals and Magazine of Natural 

 History for April, 1886). 



I have, however, made such changes in this arrangement as seemed 

 necessary to me. 



I first added to the suborder Tetrapneumones the tribus Umbellitela- 

 rice for the family Hypochilidcv, for as Hypochilus possesses four distinct 

 lamelar trachea) or luugs, each provided with a separate stigma, it 

 must be placed amongst the four-lunged spiders ; but, as this genus 

 (constituting at present alone the family Hypochilid(v) differs so widely 

 in its morphological and anatomical characters from any Tetrapneu- 

 monic form, I found myself obliged to establish a separate tribus for 

 this family — the Umbellitelarice. a name suggested to me by Professor 

 Thorell. 



The next change I have made is to separate such primitive families 

 as the Filistatidce and Dysderidce from the lowest tribus, the Tubitelariw 

 of the second suborder Bipueumones, and I have provided for these 



* Ever since the Department of Insects was established in the Museum the arach- 

 nological material has been referred to Dr. George Marx, who has become a recog- 

 nized authority thereon. The following catalogue prepared by him is based, there- 

 fore, to some extent on Museum material, and I therefore recommend it for publication 

 not only because it represents a great amount of careful labor, but because it is the 

 first attempt to prepare a complete catalogue of the described Aranea3 of North 

 America, and will be invaluable to arachnologists. 



C. V. Riley, 

 Honorary Curator of Insects. 

 Proceedings National Museum. Vol. XII— No. 782. 



Proc. N. M. 89 -32 



