92 PECKHAM. [Vol. 3. 



ZYGOBALLUS STRENUUS, SP. NOV. 



Plate VII, figs. 4-4a. 



^ . Length, 5. Length of cephalothorax, 2 ; width of 

 cephalothorax, 1.5. 

 Legs, 4132 ; first pair stoutest. 



This spider has a long oval abdomen, which overlaps the 

 cephalothorax even more than is usual in this genus, fitting 

 closely over the thoracic part. 



The cephalothorax is high and is a little wider at the 

 dorsal eyes than in front or behind. The sides are almost ver- 

 tical. The cephalic part occupies fully three-fifths of the 

 cephalothorax and is level above. The thoracic part drops 

 abruptly from the dorsal eyes and is overlapped by the abdo- 

 men. The quadrangle is wider behind than in front. The 

 tops of the middle eyes of the first row are a little higher than 

 the tops of the lateral, so that this row may be said to curve 

 downward. The middle are nearly twice as large as the lateral. 

 The second row is close to the first. The third row is as wide 

 as the cephalothorax at that place. The falces are short and 

 vertical. 



The color of the body is dark brown. The cephalothorax 

 seems to have been covered with short white hairs, and a few 

 slightly longer yellowish hairs grow around the eyes of the first 

 row. The abdomen has some short white hairs standing 

 out around the anterior end, but otherwise the integument is 

 bare, the dark brown ground color being speckled with lighter 

 spots and dots, with two wavy light brown streaks running 

 throughout the length of the dorsum. The palpus is brown, 

 with some short white hairs. The legs are almost hairless, and 

 are of a light yellow color, streaked and spotted with black. 

 The femur of the first is darkened ; the other joints of this leg 

 have a black band running lengthwise along the front side, and 

 the tibia has a second black band on the upper surface. The 

 second leg has a black band running along the anterior side of 



