334 Wisconsin Academy of Sciences, Arts, and Letters. 



Viroqua gen. nov. 



For illnstratioiij see Arachniden AustraViens, Kocli and Kejser- 



ling, Plate CYIII, figs. 2-2d. 



This genus, while in many ways like Jotus, lacks the delicate, 

 graceful appearance of auripes and of Frostii, being rather heav- 

 ily formed. The lateral eyes of the first row are more widely 

 separated from the middle eyes and are relatively smaller, be- 

 ing scarcely more than half as large, and they are placed further 

 back. The thoracic part of the cephalothorax looks higher than 

 in Jotus, falling, as it does, in a graceful slope from the dorsal 

 eyes for a short distance, and then in a steep slope, while the 

 cephalic part is strongly inclined forward. 



The cephalothorax is long, the sides being nearly parallel, but 

 wider below than above, and swollen out in front to form cheeks. 

 The quadrangle of the eyes is one-fifth wider than long, occupies 

 two-fifths of the cephalothorax, and is wider in front than be- 

 hind. The first row is curved; the second row is about halfway 

 between the first and third; and the dorsal eyes, which are 

 small, form a row not quite so wide as the cephalothorax. The 

 slope of the cephalic part is so steep that the clypeus is very nar- 

 row. The legs of the first pair are plainly longer than the 

 others, but are not much stouter. 



This genus is founded upon Jotus uliimus L. K., of which we 

 have several specimens, both males and females, sent to us by 

 Mr. Frost, from Victoria. 



Escambia P., 1896. 



Atiidae of Central America and Mexico, Occ. Papers Nat. 

 Hist. Soc. of Wisconsin, Vol. Ill, p. 41, Plate III, figs. 3-3e. 



This genus, which is very like Dynamius, is found in Central 

 and South America and Mexico. The spiders are of medium 

 size and have the third and fourth pairs of legs not very dif- 

 ferent, in length and thickness, from the first and second. They 

 are also characterized by iridescence on the cephalothorax and 

 legs. 



The cephalothorax is moderately high and convex, and is 

 usually not much wider in one part than in another, although 



