)06 Wisconsin Academy of Sciences^ Arts and Letters. 



ICIUS Simon. 1873. 



Syn.: 1850. Marpissa C. Koch, Uebers. d. Arachn.-Sysfc., 5, p. 47 (ad 

 partem). 



1850. Icelus Id., ibid, p. 55. 



1869. Attus Sim., Mono-r. d. Attid., p. 14 (24) (ad partem). 



1870. Marpcssa Thorell, on Earop. Spid., I, p. 313 (ad partem). 



1871. Attus Sim., Re vis. d. Attid. 

 1873. Iciiis Id. 



1876. " Id., Arachp. de France, III, p. 54. 



1877. " Keyserling, Spinnen aus Uruguay. Vienna, 1877-78, 



p. 631. 



1878. " Thorell. Studi Ragni Mai si e Papuani, II, p. 233 (ad 



partem) . 



1879. " L. Koch, Arachniden Australiens, p. 1137. 



1881. " Thorell, Studi Ragni Malesi e Papuani, III, p. 461 (ad 

 partem.) 



Cephalothorasc rather elongated ; thoracic part parallel, or very slightly 

 enlarged, at least a third the longer ; cephalic part plane, slightly 

 elevated, often inclined, limited by a tx*ansverse depression which is 

 straight or slightly I ent forward. 



Clypeus scarcely a quarter as wide as the lar^e middle eyes. 



Eyes of the face very unequal, touching, or the lateral ones a little sep- 

 arated, forming a straight line. Dorsal eyes as large, or a most as 

 large as the lateral, a little further apart since the sides of the quad- 

 rangle diverge very slightly behind ; quadrangle only a quarter 

 wider than long ; dorsal eyes much further from each other than 

 from the lateral borders. 



Sternum contracted in front, scarcely wider than the intermediate thighs. 

 Anterior thighs separated by the width of the lip, much thicker than 

 the others ; thighs of the second and third pairs equal, thos;; of the 

 fourth a little longer. 



Falces ( $ ) short, rather thick, almost square, vertical ; {$) longer, a little 

 inclined forward, their external border presenting an elevated, lon- 

 gitudinal rioge. 



Palpus ( S ) slender ; tibia shorter than the patella, provided with a small 

 superior external apophysis ; tarsus narrow and long. 



Legs ( 5 ) 1, 4, 3, 2 ; ( ,? ) 4, 1, 3, 3 ; those of the first piir more robust ; tibia 

 and patella at least a quarter shorter than the cephalothorax ; tibia 

 the longer, and slender. Tibia and patellaof the fourth much longer 

 than the tibia and patella of the third ; tarsus and metatarsus, male, 

 alm< st as long, female, sensibly shorter tibia and patella. Tibia of the 

 fourth scarcely a quarter longer than the patella, cylindrical, and a 

 little more slender at the extremity. Spines short, rather robust, 



