284 Wisconsin Academy of Sciences, Arts and Letters. 



ERIS (C. Koch). 1846. Simon. 



■Syn.: 1846. Eris C. Koch, Die Aracha., XIII, p. 189. 



1850. " Id., Uebers. d. Arachn.-Syst., 5, p. 59. 

 1869. Attus Sim., Monogr. d. Attid., p. 6 (16) 14 (24) (ad partem). 

 1871. " Id., Revis, d. Attid. (ad partem). 

 1876. Eris Id., Arachn. de France, III, p. 197. 



1880. " Karsch, Arachno\ Blatter VIII, Zur Kenntniss der 

 Attiden, in Zeitsch. f. d. gesammt. Naturwissenscli., 

 Llir, p. 397. 

 1883. " Sim., Arachn. de I'Ocean Atlantique. Ann. Soc. Ent. de 

 France, 1882, p. 303. 



Ceplialothorax moderately high, wide, and short ; cephalic and thoracic 

 pa^ts of the same length; tlie latter very much inclined, contracted, 

 truncated or slijjhtly hollowed. 



Clypeus moderately high, with hairs. 



Eyes of the face very unequal, in a curved line ; the lateral widely sep- 

 arated. Dorsal eyes scarcely smaller than the lateral, situated at 

 the widest point of the cephalo thorax, aad not prominent. 



■Sternum short, as narrow or narrower than the intermediate coxae. In- 

 terval between the anterior coxae often less wide than the lip at the 

 base. 



Falces vertical, short, thick. 



Legs 1, 4, 3, 2, or 4, 1, 8, 2: first pair more robust than the others, often, in 

 the males, its femur and tibia dilated. Tibia and patella of the third 

 plainly shorter than tibia and patella of the fourth. Tarsus and me- 

 tatarsus of the fourth of the same length as or scarcely shorter than 

 patella and tibia. Tibial and metatarsal spines on the four pairs; 

 less numerous, and only appearing at the extremities of the articu- 

 lations on the posterior pairs. 



*BIANOR N. 



■Syn: 1883. Scythropa Keyserling, Arachnidea Austrah"ens, p. 1446. 



-Ceplialothorax a little longer than wide, sides rounled, before and behind 

 equally contracted, high and convex, not wider than the dorsal row 

 of eyes. 



Clypeus low. 



Quadrangle of eyes behind wider than long, in front contracted, reaching 

 the middle of the cephalothorax. Anterior row substraight ; the 

 lateral a little separated from the middle eyes. Dorsal eyes further 

 from one another than from the margin of the cephalothorax. The 

 small median eyes are nearer the anterior lateral than the dorsal 

 eyes. 



* Bianor is substituted for Scythropa, the latter name being preoccupied. 



