280 Wisconsin Academy of Sciences, Arts and Letters. 



Abdomen cylindrical, constricted in front of the middle by a transverse 

 impression. 



OMOEDUS Thorell. 1881. 



Omoediis Thorell, Studi sui Ragni Malesi e Papuani, III, p. 668. 



Cephalothorax high behind, anteriorly a little dilated above^ the back 

 therefore wide, slantiog in front of the posterior eyes, behind them 

 nearly level, strongly rounded behind, when looked at from above, 

 only slightly convex transversely; the posterior slope almost verti- 

 cal, and transversely concave. 



Clypeus rather high. 



Eyes quadrangle much wider than long, not occupying half the length of 

 the cephalothorax; almost rectangular; anterior row usually curved; 

 eyes of the second row half-way between the posterior eyes and the 

 anterior lateral eyes; posterior eyes at least their own diameter 

 higher than the anterior lateral eyes, and further from each other 

 tlian from the lati-ral borders. 



Sternum wider than the coxae, not projecting between the widely sepa- 

 rated coxae of the first pair. 



Falces short, sub-vertical. 



Maxillao long, narrow at the base, sub-ovate. Lip scarcely or not wider 

 than long, apex somewhat rounded. 



Palpi those of the female not dilated nor flattened toward the apex. 



Legs rather short, ( f ) 4, 3, 1, 2 (or 2, 1?); tibia with patella of the fourth 

 pair longer than tibia with patella of the third. 



Abdomen short, a little flattened, the anterior margin truncated, covered 

 with delicate skin. 



Spinnerets six, the superior much more slender than the inferior. 



Type O. niger. 

 This genus resembles Coccorchestes Thor., differing from it especially in 



having the body sub-flattened, not strongly convex. It differs from ordi- 

 nary Attidae much less than Coccorchestes. 



COCCORCHESTES Thorell. 1881. 



Coccorchestes Thorell, Studi sui Ragni Malesi e Papuani, III., p. 671. 

 Cephalothorax slanting in front of the posterior eyes, very high behind 



them and nearly level or ascending, the posterior margin of the 



back widely truncated. 

 Clypeus high, inclined backward. 

 Eyes quadrangle wider than long, scarcely or not occupying half the 



greatest length of the cephalothorax; anterior row with the eyes 



sub-touching, ouly slightly curved upward, ejes of the second row 



further from the posterior eyes than from the anterior lateral eyes; 



posterior eyes more than their own diameter higher than anterior 



lateral eyes. 



I 



