TULLGREN, ARANE.E FR. THE GRAN CHACO. 



Measurements. 



Total length 29 mm. 



Length of cephalothorax 11 » 



Breadth » » .8,5 » 



Length » sternum 5,0 » 



Breadth » » 4 » 



Length » abdomen 14 » 



Breadth » » 9 » 



Length » 1 st. leg 27 » 



» » 2nd » 25 >> 



» » 3rd » 24,5 » 



» » 4th » 32 » 



Length of joints 1st leg.: 5,5 — 1,9 — 7,5 — 4.8 — 5 — 4,5 — 3,3 mm. 

 » » » 4th » : 4,5 — 1,8 — 7,7 — 4,5 — 6 — 7,5 — 4,5 » 

 A single female from Agua Blanca, Quinta, Prov. de 

 Jujuy, Argentine. 



Cyrthopholis Sim. 



Among the Ischnocolese only this genus is furnished with 

 a stridulating-organ situated on the trochanteres of the pedi- 

 palpus and the 1st leg. It consists of about 12 claviform 

 spines on the posterior side of the trochanter of pedipalpus 

 and on this »lyra» strike a number of long and stout curved 

 spines on the 1st leg. To this genus I must ref er three spe- 

 cimens, of which only a single one is subadult, the two 

 others are very young. Of this genus we know several spe- 

 cies from the Antilles, but only one — for all I know — 

 from the american continent: C. pernix Auss. from Mexico. 

 Though I ha ve only a subadult specimen I describe it until 

 further notice as new for science. 



C. Ij cosoides' n. sp.? 



Female. — Cephalothorax much longer than broad. Ce- 

 phalic area very low and occupying a little more than two- 

 thirds the length of cephalothorax. Cephalic and thoracic 

 strise very indistinct. Central fovea deep, nearty straight. 

 Colour dark grayish brown. Pubescence short adpressed of 

 grayish yellow colour. 



