100 
Psyche 
[December 
when both sexes of all species are known, the difference in 
the number of spines will be modified. The cusps on the 
outer corners of the cephalothorax are evidently a secon- 
dary sexual character. 
EXPLANATION OF PLATE III 
Fig. 1. Wiilfila immaculctta Banks 
Fig. 2. Schizocosa perplexa sp. n. 
Fig. 3. Nodocion agilis sp. n. 
Fig. 4. Drassyllus pullus sp. n. 
Fig. 5. Drassyllus pullus sp. n. 
Fig. 6. Herpyllus faxoni sp. n. 
Fig. 7. Oxyopes helius Chamb. 
Fig. 8. Clubiona transversa sp. n. 
Fig. 9. Tegenaria simplex sp. n. 
