1890.] NATURAL SCIENCES OF PHILADELPIIIA. 431 



are deep black and are very prominent. In alcohol the liglit mark- 

 ings aj)pear ycllowi.sh. Length of female 5 mm. 



Thifi is one of our most common spiders and is abundant running 

 on the ground in fields and gardens. Females have been taken with 

 egg bags and some covered with young, during the early part of 

 August. 



P. albopatella Emerton. 



Female. Cephalothorax similar to P. nigropalpis. Abdomen 

 with a median light band reaching to the middle, the rest of the 

 abdomen mottled but without any distinct cross stripes. 



The male according to Emerton has the lateral bands of the 

 cephalothorax broader and brighter than in P. nigroj)alpis while the 

 patella of the palpus is white. Length of female 4 mm. 



I have found only the female of this species and it does not seem 

 to be very common about Philadelphia. 



P. bilineata Emerton. 



Female, cephalothorax dark brown with a distinct broad buff 

 median band slightly wider at the anterior end, and on each side a 

 light marginal band with a dark line down the middle of it. Eye re- 

 gion black. Abdomen brown with a bright yellow'ish central band 

 in the anterior portion of which is a brown stripe, the posterior part 

 has several black dots along the margin. Beneath the abdomen is 

 light with four longitudinal lines converging near the spinnerets. 

 The two median lines are sometimes indistinct. Length of female 

 7 mm. 



This species is not very abundant but has been taken near Phila- 

 delphia. 



P. lapidicina Emerton. 



Cephalothorax brown, the central light band deeply incised in 

 front of the dorsal groove and the anterior portion more or less 

 obliterated, widest around the dorsal groove and suddenly narrowed 

 posteriorly. Lateral bands broken and irregular. Abdomen brown 

 with irregular yellowish spots arranged in two longitudinal rows 

 and more or less connected transversely and longitudinally. Legs 

 light, distinctly banded with brown. Length of female 7 mm. 



This species I have taken only among the Susquehanna hills in 

 York county, Penn. 



