488 Wisconsin Academy of Sciences, Arts, and Letters . 
EXPLANATION OF PLATE XV. 
Fig. 1. Diaptornus oregonensis: fifth feet of male(X 290). 
Fig. 2. Diaptornus Reighardi: fifth, feet of male (X 290). 
Fig. 3. Diaptornus mississippiensis: fifth feet of male (X 290). 
Fig. 4. Diaptornus oregonensis: fifth feet of female (X375). 
Fig. 5. Diaptornus mississippiensis: abdomen of female (X 105). 
Fig. 6. Diaptornus Reighardi: abdomen of female (X 290). 
Fig. 7. Diaptornus oregonensis: abdomen of female (X1G5). 
Fig. 8. Diaptornus mississippiensis: fifth feet of female (X 290). 
Fig. 9. Diaptornus Reighardi: fifth feet of female (X 375). 
