640 Wisconsin Academy of Sciences, Arts and Letters. 
EXPLANATION OF PLATE L. 
Fig. 1, Synemosyna formica, female X 6; la, profile; lb, epigynum; 
lc, face and falces of male. 
Fig. 2, Myrmarachne albocinctus, female X 6; 2a, side of cephalothorax 
of female; 2b, epigynum; 2c, male palpus. 
Fig. 3, Peckhamia scorpiona, epigynum. 
Fig. 4, Peckhamia americana, epigynum. 
Fig. 5, Neon Nellii, female X 10; 5a, male palpus; 5b, epigynum. 
Fig. 6, Sassacus barbipes, epigynum; 6a, first leg of female. 
Fig. 7, Zygoballus Bettini, female X 6; 7a, epigynum; 7b, side of 
cephalothorax; 7c, face; 7d, mouthparts and falces of male; 
7e, male palpus. 
Fig. 8, Zygoballus nervosus, epigynum; 8a, male palpus; 8b, mouth- 
parts and falces of male; 8c, tibial hook. 
