72 PECKHAM. [Vol. 2, 



second and third pairs yellow-brown, with a longitudinal black 

 line along the upper surface of patella and tibia. Fourth pair 

 dark brown. 



Habitat. Guatemala. 



DESCANSO N. 



Cephalothorax rather low, almost flat through the cephalic 

 and nearly all of the thoracic part. Thoracic part grooved on 

 the sides behind the dorsal eyes. Posterior slope more or. less 

 concave. Quadrangle from one-fourth to one-third wider than 

 long; wider behind than in front, occupying from two-fifths 

 to three-fifths of the cephalothorax. First row of eyes straight ; 

 middle less than twice as large as the lateral. Second row of 

 eyes nearer the iirst than the third row. Third row as wide 

 as the cephalothorax at that place. 



DESCANSO VAGUS N. SP. 



PI. Y., Fig. 9, female ; 9a, face and falces ; 9b, side of 

 cejihalothorax ; 9c, epigynum. 

 9 . Total length, 4 mm. 



Cephalothorax : Length, 2 mm.; width, 1 mm. 

 Legs, 4132 ; first stoutest, second next ; femur, patella 



and tibia i enlarged. 

 1st leg longer than 2d by tarsus and part of metatar- 

 sus. 

 4th leg longer than 3d by tarsus and metatarsus. 



The cephalothorax of this species is peculiar in shape. It 

 is low in front and slopes gradually upward to the third row of 

 eyes ; beyond this point is a depression, which is deepest at the 

 sides, behind the eyes, so that, in profile, a deep notch appears 

 at this point. The thoracic part rises gradually from the de- 

 pression to a ridge, and then falls in a short, concave slope to 

 the posterior margin. Falces vertical, verj' short and small. 

 CoxEe I separated by less than the width of the lip. Lip less 

 than one-half as long as maxillaj, and wider than long. 

 Sternuiii deep-set, oval. Abdomen with a constriction in front 

 of the middle. First row of eyes with the lateral slightly sep- 



