TULLGREN, ARANE^ FR. THE GRAN CHACO. 25 



Fam. Palpimanidae. 



Compsopus n. g. 



The family Palpimanidae is in South- America only repre- 

 sented by two genera; Otiothops Mc Leay diud Aniscedus Sim. . 

 Of the first genus we know more than half a dozen spe- 

 cies, the greatest part of which are collected in Brazil 

 and Venezuela, of Anissedus there is only a single species de- 

 scribed from Ecuador. For this reason it is of great interest 

 to find one more new genus of this interesting group from 

 Argentine. 



The new genus Compsopus is — as far as I understand 

 — near allied to both the south-american genera, but differs 

 in some important characteristics. 



Anterior tarsi appendiculate with very small, but distinct 

 claws. These are only two in number. On the first pair of 

 legs they are short, not reaching över the hairs on the apex 

 and furnished with very small indistinct denticles. On the 

 posterior tarsi the claws are long and slender with 4 denticles 

 (as by Anisaedus). These claws are situated on a very large 

 rufous chitinous bulb, that however not is to be regarded as 

 an onychium. Cephalothorax is oval and broad in front. 

 Diagram of eyes very broad. Anterior row very little pro- 

 curved with eyes nearly equal in size. The intervals between 

 them nearly equal in length. Lateral eyes subcontigous. Po- 

 sterior row procurved with central eyes smallest and the in- 

 tervals very long. Area of central eyes nearly squarish very 

 little broader in front. Clypeus not broader than the higli 

 of the area of central eyes. 



Table of the south-american genera. 



A. Posterior central eyes very near concentrated. 



Otiothops Mc Leay. 



B. Posterior central eyes broadly separated. 



1. Area of central eyes broader behind than in front. 

 Tarsal claws 3. Aniscedus Si7n. 



2. Area of central eyes not broader behind than in 

 front. Tarsal claws 2. Compsopus n. g. 



