594 Wisconsin Academy of Sciences, Arts, and Letters . 
EXPLANATION OF PLATE XXX. 
Fig. 1. Copris Carolina Linn.: epipharynx (X 15). 
Fig. 2. Copris Carolina Linn.: mandible (X 15). 
Fig. 3. Copris Carolina Linn.: part of mandible, with lacinia and con- 
junctivus (and with part of the galea attached), to show their 
connection (X 15). 
Fig. 4. Copris Carolina Linn.: tip of mandible, showing the fringed 
edge of the galea (X50). 
Fig. 5. Copris Carolina Linn.: maxilla (X 50). 
Fig. 6. Copris Carolina Linn.: labial structures, ventral view (X 15). 
The posterior plate of the sub-mentum is not separated from 
the gula. 
Fig. 7. Copris Carolina Linn.: hypopharynx and proximal part of labial 
lobes, showing the chitinous teeth (X 50). 
Fig. 9. Copris anaglypticus Say: epipharynx (X 15). 
Fig. 10. Copris anaglypticus Say: mandible (X15), showing again dis¬ 
tinctly the connection between lacinia and conjunctivus. 
Fig. 11. Copris anaglypticus Say: maxilla (X 15). 
Fig. 12. Copris anaglypticus Say; labial lobes and hypopharynx. 
Fig. 13. Copris anaglypticus Say: left half of hypopharynx, showing 
its two-jointed hairs (X 50). 
Fig. 14. Canthon laevis Drury: epipharynx (X 15). 
Fig. 15. Canthon laevis Drury: mandibles (X 15). 
