158 PROCEEDINGS OF THE ACADEMY OF [May, 



REVISION OF NORTH AMERICAN SPIDERS OF THE FAMILY LYCOSIDJE. 



by ralph v, chamberlin. 

 Table of Contents. 



PAGE 



Introduction 158 



Lists of described North .Ajmerican Lycosidae 163 



The Family Lycosidse 165 



Key to Genera 169 



The Genus Pardosa: 



Definition 170 



Key to species 172 



Description of species 174 



The Genus Schizocosa; 



Definition...^ 210 



Key to species 212 



Description of species 212 



Tlie Genus Lycosa : 



Definition 220 



Key to species 223 



Description of species 226 



The Genus Allocosa: 



Definition 284 



Key to s5)ecies 285 



Description of species 285 



The Genus Sosippus : 



Definition 292 



Description of species 293 



The Genus Trabea : 



Definition 295 



Description of species 296 



The Genus Sosilaus : 



Definition 298 



Description of species 298 



The Genus Pirata: 



Definition 299 



Key to species 301 



Description of species 301 



Explanation of Phates '. 316 



Introduction. 

 The Lycosidce form one of the most successful of all families of 

 spiders. Their common names of wolf and running spiders indicate 

 their dominant traits. All live close to the earth, roaming freely and 

 boldly, and with rare exceptions capturing their prey by the chase 

 rather than by means of webs or other strategy. They are among the 

 most familiar and widely distributed of spiders. The Piratas and 



