320 Wisconsin Academy of Sciences, Arts and Letters. 



Legs 3, 4, 1, 3, orM, ^. 2, rarely 4, 3, 1, 2. The two anterior pairs shorter 

 and more robust; tibia and patella of the first equal and much 

 shorter than the cephalothorax: tarsus and metatarsus almost equal, 

 a little (scarcely in the males) shorter than the patella and tibia. 

 Femur patella and tibia of 4,he third, of the same length or scarcely 

 longer than the same articulations in the fourth pair. Tibia of the 

 third (and of the fourth, though less) enlarged fiom base to ex- 

 tremity ; tarsus and metatarsus of the fourth as long as patella and 

 tibia. Femoral, tibial and metatarsal spines on the four paii's; patel- 

 lary spines on the third and fourth. Metatarsus of the fourth with 

 spines to the base. 



YLLENUS Simon. 1§69. 



^yn.: 1869. Ylleiius Sim., Monogr. d. Attid., 166 (633). 



1870. " Thorell, On Europ. Spid., I, p. 219 (ad partem). 



1876. " Sim., Arachn. de France, III, p. 127. 



1878. " Lebert, Die Spinnen der Schweiz, p. 313 (ad 



partem). 



Cephalothorax rather long; very high; thoracic part strongly dilated, 

 twice as long as the cephalic . Cephalic part slightly convex, in- 

 clined, linaited by a very slight depression. 



Clypeus almost as wide as the middle eyes, with thick hairs. 



Eyes of the face quite unequal, well separated, particularly the lateral 

 forming a line strongly curved, the summit of the middle eyes 

 being on a level with the center of tlie lateral eyes, 

 or very slightly highfr. Dorsal eyes smaller than the lateral, 

 and further apart, not prominent. Quadrangle at least a third 

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

 lateral borders . 



Ste7mum short, narrower than the intermediate coxae. Interval between 

 the anterior coxae not quite so wide as the lip. Anterior coxae 

 thicker than the others; second, third and fourth coxae equal in 

 thickness; fourth coxae longest. 



Falces weak, shorter than the face, vertical in both sexes. 



Palpus short, very robust and mttssive; patella and tibia well (developed 

 tarsus relatively small, often compressed and raised into a ridge. 



Legs 4, 3, 1, 2; first and second pairs shorter and much more robust, par- 

 ticularly the first; tibia and patella of the first equal, and ruuch 

 shorter than the cephalothorax: tarsus and metatarsus equal and 

 much shorter than patella and tibia; femur, patella and tibia of the 

 third much shorter than the same articulations of the fourth pair. 

 Tibia of the fourth a good deal enlarged from base to extremity, 

 and compressed; tarsus and metatarsus of the fourth much shorter 



