602 Wisconsin Academy oj Sciences, Arts and Letters. 
EXPLANATION OF PLATE XXXI. 
Fig. 1, la, Phidippus Johnsonii, varieties of female abdomen X 3; 
lb, lc, Id, le, varieties of epigynum; If, lg, lh, li, male 
palpus; lj, diagram of tibia of palpus showing apophysis. 
Fig. 2, P. formosus, female abdomen; 2a, 2b, male palpus; 2c, diagram 
of tibia of palpus showing apophysis. 
Fig. 3, P. californicus, male X 3; 3a, another male; 3b, young female 
X 3; 3c, 3d, male palpus; 3e, mouthparts of male. 
Fig. 4, P. ardens, female X 3; 4a, epigynum; 4b, male palpus. 
Fig. 5, P. princeps, epigynum. 
