TULLGREN, ARANE.5: FR. THE GRAN CHACO. 35 



stinct, but central fovea indistinct. Colour påle yellowish 

 brown with the thoracic part more or less blackish. Very 

 short grayish pubescence. 



Eyes. Anterior row straight with eye.^, and intervals 

 nearly eqiial in size. Anterior central eyes nearly twice 

 their diameter apart. Area of central eyes nearly sqna- 

 rish, as long as broad, as broad in front as behind. Poste- 

 rior centrals a trifle larger than anteriors and about their 

 diameter apart. The interval between anterior centrals a 

 trifle larger. Lateral eyes subcontigous and nearly equal in 

 size. Posterior row recurved with lateral eyes smaller. Cly- 

 peus nearly as hijrh as the diameter of anterior. centrals. 



CheUceres very convex, påle yelloAvish brow^n with the 

 convexity blackish. Fang-groove with 2 teeth at the inner 

 margin and with 3 ones at the outer. 



Coxce of pedipalp and lahium blackish. 



Sternum cordiform, a little longer than broad, black with 

 a narrow reddish longitndinal stripe. 



Legs 1. 2. 4. 3. Påle testaceous brown with blackish ir- 

 regular rings in the middle and at the ends of the longest 

 joints. With numerous blackish spines. 



Abdomen broad oval, with a low^ mamilliform tubercle 

 on each side, or corner, of the före extrem ity. Colour is 

 påle grayish brown with indistinct blackish markings. On 

 the back at first a more or less triangulär spöt and behind 

 that at least two transverse wavy bands. The venter with a 

 large irregular black spöt in the middle. 



Vtdva strongly vertically projected with a very narrow, 

 short and curved clavus (conf. the fig. 12 a and b). 



Measureraents. 



Total length 3,2 mm. 



Length of cephalothorax 1,6 » 



Breadth » >> 1 » 



Length » abdomen 2,5 >> 



Breadth » » 2 » 



Length >> 1st leg 5 » 



» >> 2d » 4,2 » 



» >> 3d » ........ 2,5 » 



>> » 4th » 3,9 >> 



A single adult female from Tatarenda, Bolivia. 



