578 PROCEEDINGS OF THE ACADEMY OF [AugUSt, 



black in alcohol (probably deep black in life), the extreme margin 

 yellow, and with a pair of yellow lines on the dorsum. 



It differs also from another closely related species, P. exigua 

 (correctly exiguus) Banks, in slightly greater size, in the structure 

 of the epigynum, and to some extent in coloration. 



26. Pirata liber n. sp. (PI. XXX, figs. 42, 43.) 

 1 Pirata piratica QXerck., Stone, 1890. 



(cJ*, ?, types, Philadelphia, author's collection ; numerous speci- 

 mens from Philadelphia and vicinity. ) 



Eyes. — First row nearly as broad as the second, ils lateral eyes 

 slightly higher. Eyes of second row largest, about half their 

 diameter apart. Third row broadest, its eyes much nearer the 

 second row than each other. Dorsal eye area less than one-fifth 

 the length of the cephalothorax. 



Form. — Superior spinnerets nearly twice the length of the inferior. 

 Cephalothorax in front almost one -half its greatest transverse 

 diameter, flattened above and highest at middle. Sides of head 

 vertical. Chelicera about 1^ times the height of the head in 

 front. Sternum longer than broad, its anterior margin straight. 

 Legs ratliRr slender. 



Dimensions. — Length of cephalothorax, cf, 2.2 mm.; 9, 

 2.8 mm. 



Length of abdomen, cT, 2.2 mm. ; 9, 2.8 mm. 



Length of first leg, 9, 7.5 mm. 



Length of second leg, 9, 6.6 mm. 



Length of third leg, 9, 7 mm. 



Length of fourth leg, 9, 9.3 mm. 



Color in Life, 9, type. — Cephalothorax longitudinally banded 

 brown and yellowish, as follows: A narrow yellow median band 

 extending from between the second eyes in front to not quite the 

 middle of the cephalothorax behind, and bordered on each side by 

 brown; two yellow lines starting at the lateral borders of the first 

 and second eye rows, and becoming thicker converging backward to 

 the sides of the dorsal groove, from whence they ax'e continued back 

 as one median line to the end of the thorax, and each of these bor- 

 dered laterally by a brown band, the widest of all the bands, and 

 with deeply scalloped lateral margin; lateral from the latter a 

 vellow band, then a narrower and shorter brown band, then a s^till 



