Superfamily Argiopoidea 



HH. First two pairs of legs similar. P. 693. 



Plexippus 

 DD. Small eyes much more remote from the posterior 

 eyes than from the anterior eyes. 

 E. Ocular quadrangle much wider behind than before. 

 F. Cephalothorax very wide, the thoracic part* 

 shorter than the head-part or at all events 

 not longer. 

 G. Abdomen marked with white in addition to 

 the basal band. P. 696. Zygoballus 



GG. Abdomen not marked with white except a 

 basal band. P. 687. Agassa 



FF. Thorax longer than head. Pass to F. and FF. 

 under EE. immediately below. 

 EE. The sides of the ocular quadrangle nearly parallel. 

 F. Cephalothorax more or less depressed behind 

 the posterior eyes and furnished with a median 

 furrow situated behind the eyes but before 

 the middle of the thoracic part. 

 G. Cephalothorax high, heavy, and convex; first 

 legs heavy and very hairy, often fringed; 

 large species, rarely less than .28 inch in 

 length. P. 680. Phidippus 



GG. Cephalothorax not heavy; first legs not espe- 

 cially hairy; small species, rarely more than 

 .24 inch in length. 

 H. Third leg as long as or longer than fourth. 

 P. 674. Talavera 



HH. Fourth leg longer than the third. 



I. Posterior three pairs of legs white, trans- 

 lucent, without marks. P. 679. Wala 

 II. Posterior three pairs of legs not uniform 

 white. P. 684. Dendryphantes 



FF. Cephalothorax not depressed behind the eyes; 

 median furrow remote from the eyes, very small, 

 obsolete. 

 G. Cephalothorax narrow and long; no spines 

 on the tibia of the first legs. P. 679. 



Admestina 



* In descriptions of Attidae that part of the cephalothorax behind the posterior eyes is regarded 

 as the thoracic part, and the remainder us the cephalic part. 



668 



