570 GEOLOGICAL SURVEY OF THE TERRITORIES 
EXPLANATION OF PLATE XXVIII. 
Figs. 1-5. Lstheria mexicana Claus, immature specimens from .Kentucky (£. clarkii 
Pack.). 
Fig. 1. Thoracic leg, female. 
Fig. 2. Fifth leg from the last. 
Fig. 3. First antenna. 
Fig. 4. Second antenna. 
Fia. 5. Telson. 
Fic. 6. Estheria jonesii Baird ; second antenna. 
