TULLGREN, ARAXE-5: FR. THE GRAN CHACO. / 1 



Saitis Sim. 



Simon. Hist. nat. d. Araignées, T. TT. p. .505. 



S. uncifer n. sp. (Pl. 9, fig. 36 a— c). 



Male. — Cephalothomx longer than broad with rounded 

 sides. It is comparatively liigh with slightly curved profil, 

 with a straight decHvity behind. Central furrow verv short, 

 situated in a small transverse, shallow depression immedia- 

 tely behind the posterior eyes. The pubescence is nearly 

 perfectly shaved off, but around the anterior eyes there are 

 circles of orange-red hairs. The colour is black, on eacb 

 side of thoracic part a longitudinal reddish brown short band. 



Eyes. — Anterior row nearly straight (very little recur- 

 ved) with lateral eyes much smaller and separated from cen- 

 trals by a space much shorter than their diameter. Clypeus scar- 

 cely as high as the radius of anterior centrals, strongly in- 

 clined. Eyes of second row very small situated a little nea- 

 rer those of the third row. Eyes of third row very little 

 smaller than anterior laterals. Quadrangle of eyes a little 

 narrower behind, much shorter than tlie posterior part of 

 cephalothorax. 



Cheliceres are black ^\^th reddish broAvn tips. They are 

 much shorter than the face, cylindrical with a low tubercle 

 at the outer apical corner. Inner margin of fang-groove 

 with a low, conical, black tooth. 



CooiXB of jjedipalp dark blackish brown with testaceous 

 apex. At the outer apical corner with a small a little for- 

 wards directed tooth. 



Lahium of the same colour, about as long as broad. 



Sfenium yellowish, much longer than broad, projected 

 between the first pair of coxae. 



Legs yellowish, more or less with blackish longitudinal stri- 

 pes. Patella + tibia III much longer than patella -f tibia IV. 

 Anterior metatarsi much longer than tarsi. Patellae with a 

 spine on each side. Tibiae I and II ^4th 2. 2. 2 spines be- 

 neath and three ones on anterior side. Metatarsi I and II 

 with 2. 2 spines beneath. Posterior legs with numerous long 

 spines. 



Ahdomen elongate oval, with a large longitudinal brow- 

 nish testaceous band on the back. Venter black with four 

 longitudinal rows of small testaceous döts. 



