432 PROCEEDINGS OF THE ACADEMY OF [1890. 



P. nigra nov. sp. (PI. XV, fig. 4, 4a.) 



Cephalothorax smooth and shining, uniform black with a reddishi 

 brown luster, no stripes whatever. Sternum and coxae similar, 

 somewhat lighter. Abdomen black, indistinctly mottled with olive 

 brown or gray, without any distinct pattern, though there is a more 

 or less distinct light median stripe on the anterior part reaching 

 nearly to the middle. The sides of the abdomen are black, thickly 

 speckled with small gray dots. Beneath brownish, with no distinct 

 markings. Mandibles and palpi shining dark reddish brown, front 

 edge of cephalothorax just below the first row of eyes, yellowish. 

 Legs, femur dark shining like the cephalothorax, patella white ; the 

 first and second pairs have the other joints entirely yellowish white, 

 the third pair are similar but with prominent black spines while the 

 fourth pair have the tarsus banded with brown at the ends. Two 

 females with egg bags were taken running in a pasture field in Ches- 

 ter Co., Penna., in the latter part of August. Length of female 5 

 mm. 1st leg 5? mm. 4th leg 9 mm. 



Genus OCYALE. 



The cephalothorax and abdomen are rather more elongated than 

 in Dolomedes or Lycosa. The hind row of eyes is nearly on a line 

 with the second, and the front row is equidistant between the sec- 

 ond row and the front of the cephalothorax. 

 0. undata (Hentz). 



Cephalothorax light bulf with a broad, bro^vn median band as 

 wide as the eye area. Abdomen with a central band, somewhat 

 scalloped on the edges. Legs buff". Old specimens have the legs 

 darker and the abdominal markings less distinct. Length of female 

 12 mm. 



This spider is quite common, being found on bushes or among 

 grass where it spins a loose mass of web and deposits its egg bag. 

 I have sometimes noticed it make its nest in the folds of a window 

 curtain inside the house. I have taken specimens at Philadelphia 

 and in Chester Co., Penna. 



Genus DOLOMEDES. 



The cephalothorax in this genus is very broad, the second and 

 third rows of eyes are nearly as in Ocyale but the front row is much 

 nearer to the second than to the edge of the cephalothorax. The 

 species live about water. 



