46 ARKIV FÖR ZOOLOGI. BAND 2. N:0 19. 



by a narrow brown edge. Behind that a transverse testa- 

 ceous plate and on each side a narrow arcuate blackish mar- 

 gin. Conf. the fig. 20. 



Measurenients. 



Total lengtli 7,6 mm. 



Length of cephalothorax .... 2,s » 



Breadth » » .... 1,8 » 



Length » abdomen 4,6 >> 



Breadth » » 2,4 » 



Length » 1st leg ....... 12,6 » 



» » 2d » 8,4 » 



>> » 3d » 7,6 » 



>> » 4th » 10,8 » 



A single adult female from Salta in Bolivia. 



This species is perhaps near related to O. quinquenota- 

 tum Sim. from Brasil but differs in some important charac- 

 teristics especially in colour. 



Anyphaena Smid. 

 A. biconiuta n. sp. (Pl. 7, fig. 21.; 



Female. - — Cephalothorax elongate-oval, slightly tapering 

 in front, cephalic and thoracic striae very indistinct, central 

 furrow long and distinct. The colour is yellow on each side 

 with a blackish broad band, that is mos t distinct in front. 

 Region of eyes and clypeus reddish brown. The whole sur- 

 face clothed with a short white and blackish piibescence. 



Eyes. — Anterior row nearly straight, very little reciir- 

 ved with the central eyes much smaller and about their 

 radius apart; the distance from anterior laterals a trifle shorter. 

 Posterior row slightly procurved, with posterior laterals a 

 trifle larger and intervals nearly equal in length. Lateral 

 eyes equal and about their radius apart. Area of eyes a 

 little longer than broad, narrower in front. Posterior centrals 

 a little larger than anterior ones. Clypeus as high as the 

 diameter of anterior centrals. 



Cheliceres long, dark brown with paler eJongate-oval spöts 

 at the base. Inner margin of the fang-groove with 6 very 

 small stout teeth, outer margin with 5 ones. 



