582 PROCEEDINGS OF THE ACADEMY OF [AugUSl, 



buff mediau baud, narrowest at the posterior edge of the thorax, 

 enlarging from the median groove forward, and reaching ante- 

 riorly in the mid-line to in front of the posterior eyes and on the 

 sides to the first eye row, this buff band divided into three ante- 

 riorly by two darker lines which converge from the posterior eyes 

 to the dorsal groove ; on each side is a black line from the second 

 to the third eyes. Sternum yellowish with narrow black margin, 

 and sometimes two broader, rather indistinct darker longitudinal 

 bands. Abdomen above dark yellowish-brown, variable in color; 

 in two specimens marbled with yellow and brown on the anterior 

 part of the dorsum, in the third with thi'ee pairs of black spots, 

 in the fourth with a broad yellow mediau band on the auterior half 

 uarrowiug suddenly just behind the middle and continuing to the 

 spinnerets, while the posterior half of the dorsum has a few trans- 

 verse yellow and brown lines; sides brownish or yellowish; venter 

 yellowish, lighter than the sides, without distinct spots but with an 

 indistinct dark mark behind the epigynum. Epigynum reddish- 

 brown. Chelicera light reddish -brown. Labium and maxillce 

 yellowish-brown. Legs and palpi pale yellowish-brown. 



Comparison. — ^See P. nigromaculatus. 

 29. Pirata marxi Stone. (PI. XXK, fig. 47.) 

 Pirata marxi Stone, 1890. 



(1 9, type, York county. Pa., Stone Coll.) 



Eyes. — First row fully as broad as the second, its lateral eyes 

 higher. Eyes of second I'ow largest, about their diameter apart. 

 Third row broadest, its eyes much nearer the second row than each 

 other. Dorsal eye area less than one-sixth the length of the ceph- 

 alothorax. 



Form. — Superior spinnerets fully double the length of the inferior, 

 Cephalothorax in front about one-half its greatest diameter, highest 

 about the middle. Chelicera about 1^ limes as long as the head 

 is high in front. Sternum longer than broad. Legs rather stout. 



Dimensions. — Length of cephalothorax, .3.4 mm. 



Length of abdomen, 4.5 ram. 



Length of first leg, 11.5 mm. 



Length of .second leg, 11 mm. 



Length of fourth leg, 14 mm. 



Color in Alcohol. — Cephalothorax clear reddish-brown, a yellow- 

 ish submarginal band not extending to the head, a narrow buff 



