380 Wisconsin Academy of Sciences, Arts and Letters. 
Fissidentati. 
f Cephalic part occupying at least 1-2 of cephalothorax 
2 J (Agobardus, Zygoballus, Poultonella) . 2 
| Cephalic part occupying less than 1-2 of cephalothorax 
l (Maevia, Thiodina, Fuentes) . 4 
( Cephalothorax very high, and square above. Cephalic part 
2 j longer than thoracic . Zygoballus 
( Cephalic and thoracic parts equally long.. 3 
( Tibia I not enlarged, with three pairs of spines below. Agobardus 
3 j Tibia I as wide as long, with less than three pairs of 
( spines . Poultonella 
^ ( Tibia I spined below, but without bulbous hairs . 5 
( Tibia I with 2-2 spines and 2-2 bulbous hairs below.. Thiodina 
p. J Tibia I 4-4 spines below . 6 
{ Tibia I 3-3 spines below. Icius Wickhamii 
f Cephalothorax low; first leg thickened. Abdomen with 
g j four longitudinal white lines on a dark ground .. Onondaga 
i Cephalothorax high; legs slender. Abdomen without white 
lines ... Maevia 
Pluridentati. 
Under this head we have but one genus, Ballus, and part of Thiodina. 
PHIDIPPUS C. K. 1846. 
Type, S. VARIEGATUS LUCAS. 
1833. Salticus (variegatus) Lucas, Ann. Soc. Ent. Fr., II, p. 476. 
1837. Attus, Walck., Hist. Nat. des Ins. Apt., I, p. 432. 
1844. Attus H., Jour. Bost. Soc. Nat. Hist., IV. 
1845. Attus H., Jour. Bost. Soc. Nat. Hist., V. 
1846. Phidippus C. K., Die Arachn., XIII, p. 125. 
1875. Attus H., Occ. Pap. Bost. Soc. Nat. Hist., II, pp. 50, 51, 58, 59. 
1877. Phidippus Th., Bull. U. S. Geol. Survey, XV, p. 523. 
1883. Attus P., New or little known Attidae, pp. 1, 6, 13, 15, 16, 18, 
22 , 23, 31, 33. 
1885. Phidippus Keys., Ver. z. b. Gesell., Wien, VI, pp. 1-11. 
1888. Phidippus P., Wis. Acad. Sciences, Arts and Letters, VII, N. A. 
Att., pp. 11-25. 
1890. Phidippus McC. Am. Spid., II, p. 149. 
1891. Megatimus Th., Spindlar Nikobarerna, p. 129. 
1891. Phidippus Em., Trans. Conn. Acad., VIII, N. E. Att., pp. 6-9. 
1892. Phidippus B., Proc. Acad. Nat. Sci., Phila., Jan. 1892, p. 74. 
