TULLGREN, ARANE.i: FR. THE GRAN CHACO. 17 



area slightly raised and occupying a little more than half 

 the length of cephalothorax. 



Eyes. — Ocular tumulus broad oval high in the middle 

 of the front, in other parts low. Anterior row procurved 

 with the posterior margin of laterals aHgned with centre of 

 centrals. Anterior centrals circular, more than half a dia- 

 meter apart, the same distance from laterals, that are ellip- 

 soidal and with their axes distinctly longer than the dia- 

 meter of centrals. Laterals distinctly separate, anteriors by 

 a fourth larger than posteriors. Posterior centrals smallest, 

 a little more removed from anterior centrals than from poste- 

 rior laterals. 



Cheliceres dark brown with blackish long hairs. Inner 

 margin of the fang-groove with 6 stout teeth, outer margin 

 with 6 or 7; a third row of about 3 minute cusps close to 

 outer row on inner side at base. 



Lahium much broader than long, not spinose. 



Coxa of pedipalp longer than broad; anterior distal angle 

 slightly produced and rounded, basal anterior angle studded 

 with nnmerous minute cusps. Colour påle brown and fringed 

 with long rufous yellow hairs. 



Pedipalpus with numerous long spines and the claw with 

 10 long denticles. 



Sternum a little longer than broad, dark rufous brown 

 to nearly black. Four pairs of sigillse; 1st pair confluent 

 at the base of labium, the other pairs small marginal. 



Legs, 4. 3. 2. 1. — Femora dark brown, other joints 

 paler by young specimens with distinct blackish rings at the 

 ends; by fuUgrown specimens are these joints very dark and 

 the rings indistinct. The legs are clothed with long and fine hairs 

 of dark colour. Tibia with ]. 2 spines; metatarsus I with 

 2. 2. 3 and tarsus I with 2. 1. 2. spines beneath. Tibia II 

 with 2. 2. 2, metatarsus II with 2. 2. 3 and tarsus II with 

 2. 1. 2 spines beneath. Tarsus III with 2. 2, tibia and meta- 

 tarsus IV with numerous and tarsus IV with 2. 2. 2 spines 

 beneath. Tarsal claws 3; superior claws with 9 on the 1st 

 legs and 6 or 8 denticles on the 4th ones; inferior claws with 

 3 denticles. 



Ahdomen broad oval, broadest behind, deep brown with 

 two pairs of small transverse-oblique påle testaceous spöts on 

 the middle of the back and behind these a longitudinal stripe 



Arhiv för Zoologi. Bä 2. N:o 19. 2 



