TULLGREJ^-^, ARANE.^ FR. THE GRAN CHACO. 49 



Ahdomen dark grayish brown, clothed with a thick gol- 

 den yellovv pubescence on the back and the sides. The ven- 

 ter with a broad backwards tapering black band, sometimes 

 with very smal white döts arranged in longitudinal rows, the 

 two middle-ones very short. 



Vtdva brownish red and black, broader than long, a 

 little transversely projecting in the middle. On each side a 

 short and stout backwards directed black tooth. In others 

 conf. the fig. 22 a. The fig. 22 b a not fullgrown vulva. 



Measurements. 



Total length 20 mm. 



Length of cephalothorax 8,5 



Breadth » » 7 



Length » abdomen 10,5 



Breadth » » 7^5 



Length » 1st leg 25,5 



» » 2d » 23,5 



» )> 3d » 21 



» » 4th » 29,5 



Of this species several subadult and adult females from 

 Tatarenda in Bolivia. 



Trachelopachys Sim. 

 T. bidentatus n. sp. (Pl. 7, fig. 23 a, b). 



Male. — Cephalothorax broad oval, comparatively high. 

 Central furrow short but distinct. Cephalic and thoracic 

 striaé indistinct. The integument coriaceous, coarsely and 

 closely pointed. The colour is dark blackish brown. Thinly 

 clothed with white hairs. 



Eyes. Anterior row slightly procurved with central eyes 

 very little larger.' Anterior centrals not fuUy their diameter 

 apart, distance from anterior laterals much shorter, shorter 

 than the radius. Area of central eyes nearly squarish, about 

 as high as broad, scarcely narrower in front; anterior cen- 

 trals much larger than posterior ones. Posterior row strongly 



Arkio för zoologi. Bd 2. N:o 19. 4 



