1904.] NATURAL SCIENCES OF PHILADELPHIA. 267 



broader than long. Sternum longer than broad, pointed posteriorly. 

 Posterior spinnerets about t-^ice as long as the anterior. Tarsi w-ithout 

 scopulse; metatarsus IV as long as patella and tibia combined. Length 

 of leg IV to cephalothorax as 4 : 1. 



Comparisons. — ^This genus approaches both Aidonia and Pardosa. 



Genus PARDOSA C. Koch, 184S. 



The main distinguishing characters of this genus are those men- 

 tioned in the Key, namely: Metatarsus IV longer than patella 

 and tibia combined; eyes of the second row at least 1.5 times their 

 diameter apart ; sides of the head more or less vertical ; chelicera weak 

 and nearly straight in front (their length not more than one and 

 three-fifths times the height of the head in front, with 3 pairs of teeth) ; 

 and the dorsal eye area quite or almost one-quarter the length of the 

 cephalothorax. Further, the cephalothorax is always highest at the 

 posterior eyes, and in front not more than one-half its greatest trans- 

 verse diameter; and the legs are long and slender with long spines, 

 the fourth leg never less than 4.2 times the length of the cephalothorax, 

 and very frequently the legs are proportionately longer in the females 

 than in the males (the reverse being the case in the other genera) . The 

 labium is small, not one-half the length of the maxillae, and usually 

 not longer than wide (except in mercurialis, glacialis and groenlandica). 

 The posterior spinnerets are longer than the anterior, and the first eye 

 row always shorter than the second. The d^ palpal organ is usually 

 very large. Tibia I has either 3 or 4 pairs of ventral spines. 



The relationships of the genus are with Trahcea and Lycosa. 



Key to Species of Pardosa. 



a. 1. — Dorsal eye area more than one-quarter the length of the cepha- 

 lothorax, cephalothorax less than 3 mm. 

 b. 1. — Coxse above without spots, middle eyes of the first row 



largest, scita. 



b. 2. — Coxse above spotted with black, eyes of the first row 

 adequal. 

 c. 1. — Median thoracal band much narrowed behind the dor- 

 sal groove, body dark colored, .... minima. 

 c. 2. — Median band of cephalothorax with nearly parallel 



margins, body pale colored, pallida. 



a. 2. — Dorsal eye area not more than one-quarter the length of the 

 cephalothorax. 

 b. 1. — Cephalothorax from 3.S-5 mm. in length. 



c. 1. — All the joints of the legs except the tarsi thickly cov- 

 ered with fine long hairs, groenlandica. 



c. 2. — Hairs on the legs short, glacialis. 



