96 PECKHAM. [Vol. 3. 



are medium brown, except the tarsi, which are white. The legs 

 of the first pair are of a dark brown, except the patella and the 

 tarsus, which are white with a satiny lustre. The other legs 

 are very pale yellow, like the abdomen. 



We have a .single male from Guatemala. 



SIOrSA RECONDITA, SP. NOV. 



Plate \U, figs. 6-6b. 



9 . Length, 6. Length of cephalothorax, 2 ; width of 

 cephalothorax, 1.5. 

 Legs, 4312 ; the first and second plainly shorter than 

 the third and fourth and but little stouter. 



The cephalothorax is high and is a little longer than wide. 

 It is widest at the anterior end, contracts a little in the cephalic 

 part, and widens again in the thoracic. The sides slant inward 

 from the upper surface to the lower margin. The cephalic 

 part slants very abruptly forward. The thoracic part has, just 

 behind the dorsal eyes, a crescent-shaped plate which slants 

 backward, and then falls steeply. The highest point is at the 

 dorsal eyes. 



The anterior eyes are large and form a straight row, the 

 latei'al being about two-thirds the size of the middle. The 

 middle eyes are subtouching while the lateral are a little separated 

 from them. When looked at from above the second row seems 

 to be half-way between the first and the third, but from the 

 side it appears to be nearer the third than the first. 



The dorsal eyes form a row as wide as the cephalothorax 

 at that place, and stand out prominently, marking the hinder 

 corners of the cephalic plate. 



The quadrangle of the eyes is wider in front than behind, 

 is one-third wider than long, and occupies one-half of the 

 cephalothorax. 



The clypeus is narrow. The falces are vertical and rather 

 long, but only moderately stout. 



