1904.] NATURAL SCIENCES OP PHILADELPHIA. 277 



varies from 1 : 4.5 to 1 : 7. The length of leg IV to the cephalotho- 

 rax from 2.7 : 1 to 4.7 : 1. The legs are usually well scopulated. 



Lycosa intergrades very closely with Pardosa, and the species 

 hilineata, relucens, ocreata and scutulata are quite intermediate. The 

 relationship '^ith Trochosa is equally close. More remote are the rela- 

 tions to Pirata, yet P. elegans has a number of Lycosoid characters. 



Key to Species of Lycosa. 



a. 1. — Abdomen above -vv-ith a distinct, broad dark median band 

 extending its entire length. 



b. 1. — Sternum black, punctulata. 



h. 2. — Sternum yellow, scutulata. 



a. 2. — Abdomen not so colored. 



b. 1. — Cephalothorax smooth, without hairs, not more than 2.5 

 mm. long, 

 c. 1. — Eyes of the second row about 1.3 times their diameter 



apart, venter brown, nigra. 



c. 2. — Eyes of the second row not quite their diameter apart, 

 venter yellow with a few brown spots, 



rugosa Keyserling. 

 b. 2. — Cephalothorax haired, more than 2.5 mm. long. 



c. 1. — Cephalothorax ^\dth a very narrow median light band, 



inhonesta. 

 c. 2. — Cephalothorax with a broad median band. 

 d. 1. — Cephalothorax 5 mm. or more in length. 



e. 1. — Eyes of the second row fully 1.5 times their 



diameter apart, pictilis. 



e. 2. — Eyes of the second row about, their diameter 

 apart. 

 /. 1. — Cephalothorax less than one-c[uarter 

 longer than broad, 



pidchra Keyserhng. 

 /. 2. — Cephalothorax decidedly more than one- 

 quarter longer than broad. 

 g. 1. — Legs not annulated, abdomen with a 

 dorso-median light band extend- 

 ing its entire length and including 

 a dark band in its anterior half, 

 1. lepida. 



g. 2. — Legs distinctly annulated, abdo- 

 men not so colored. 

 h. 1. — Median band of the cephalo- 

 thorax not or scarcely con- 

 stricted anterior to the medi- 

 an groove, . . . mccookii. 

 h. 2. — Median band of the cephalo- 

 thorax deeply constricted an- 

 terior to the median groove. 

 i. 1. — Venter light, euepigynata. 



