176 PECKHAM. [Vol. 2, 



The first legs are lacking ; the others are 842. 



9 . Total length, 4.4. Length of cephalothorax, 2.2 ; 

 width of cephalothorax, 1.8. 



Legs, 3412 ; first and second pairs a little enlarged. 



The falces are vertical, long and moderately stout. The 

 labium and maxillse are rounded. The sternum is oval. 



The cephalothoi'ax is very dark brown, with black spots 

 around the eyes. There are a few white hairs left on the sides, 

 which ma)^ have entirely covered them. The upper surface 

 seems to have been covered with very l^riliiant pink and green 

 iridescent scales. In the females the ground-color of the abdo- 

 men is black, with a covering of the same iridescent scales. 

 Two curved white bands nearly meet in the middle line, around 

 the anterior end, and further back, on each side, two white 

 bands come up from the lower sides. There are some indis- 

 tinct, pale chevrons on the posterior half. The abdomen, in the 

 male, is more slender than m the female. The coloring is 

 similar, but the white appears only in two spots, low down on 

 each side, and in a band around the anterior end. 



The falces and the coxa, trochanter, femur and patella of 

 the first leg, are dark brown ; otherwise the legs are light brown 

 except for a smoky darkening on the femoral joints. 



M'^e have one male and one female from the Amazon, sent 

 us by M. Simon. 



SABSACUS GEN. NOV. 



The cephalothorax is rather high, and is plainly longer 

 than wide. It grows broader from the first row of eyes to the 

 widest part, which is considerablj' behind the dorsal eyes, at 

 the point where the thoracic part begins to fall. The sides are 

 not far from vertical, rounding outward more in the thoracic 

 than in the cephalic part. The cephalic and two-thirds of the 

 thoracic part are fiat and on a level, or nearly so. 



The quadrangle of the eyes is much wider behind, and is 

 about as long as it is wide in front. It occupies about one-half 

 of the cephalothorax. The anterior eyes are close together in 



