22 ARKIV FÖR ZOOLOGI. BAND 2. K:0 19. 



Fam. Dictynidae. 

 Auximus Sim. 



Simon, Eug. Hist. nat. cl. Araignées, T. T. fasc. 1, pag. 239, 1892. 



As far as I can find out onty three species from the 

 South- American continent are before described. One of them 

 A, fuegianus Sim. is distributed in the most soiithern parts: 

 Pa tagonia and Tierra del Fuego. The two others A . plagiatus 

 Sim. and crinitus Sim. are fomid in Venezuela. In the col- 

 lection of Mr Nordenskiöld we meet with further one that 

 is distinctly separated from the species mentioned above. 



A. biseriatus n. sp. (Pl. 2, fig. 5). 



Female. — C ephalothorax is yellow-brown, a httle darker 

 in front. Cephalic area occupying nearly two thirds the 

 length of cephalothorax. It is comparatively high and con- 

 vex broadly truncated in front and with distinct lateral striae. 

 Central furrow comparatively long, very distinct. Thoracic 

 area low with distinct strise. The whole surface, especially 

 that of cephalic area with adpressed black hairs. 



Eyes. — Anterior row nearly straight with the central 

 eyes much smaller than the lateral ones. Anterior centrals 

 about their diameter apart and very little longer removed 

 from the anterior laterals. Area of central eyes a little longer 

 than broad, much narrower in front. Posteriors slightly but 

 distinctly procurved. Eyes about equal in size. Posterior 

 centrals nearly twice their diameter apart and the distance 

 from posterior laterals distinctly longer. Posterior laterals 

 smaller than anterior ones and the in ter val between the late- 

 rals shorter than the diameter of the latter. Laterals a little 

 obliquely elevated. 



Cheliceres dark bro^vTi brilliant. Inner margin of the 

 fang-groove with 5 st out teeth gradually increasing in length 

 from the insertion of the claw. Outer margin with 6 teeik, 

 of which the two most removed ones are largest, the others are 

 very minut e. 



Labhim longer than broad, straightly truncated at the 

 base and of dark reddish brown colour. 



