PLATE LVII. 
Fig. 1. Oplticentrus varipennis, page 250. 
Fig. 1*?. The Irons and pilose metopidium with the suprahumerals by front aspect. 
Fig. 2. Oplticentrus trispinifer, page 250. 
Fig. 2 a. Head by the front aspect. 
Fig. 3. Ophicenirus curvicornis, page 250. 
Fig. 3 a. Frons and pronotal adjuncts. 
Fig. 4. Rabducltus gnomon, page 251. 
Fig. 4 a. Dorsal view of the insect. 
Fig. 4b. Frons and metopidium. 
Fig. 5. Pedalion triste, page 252. 
Fig. 5 a. Head with the short suprahumerals. 
Fig. 6. Pedalion ornatum, page 252. 
Fig. 6 a. The rudder-like posterior horn is typical of this genus. 
Fig. 7. Pedalion delalandei , page 252. 
Fig. 7a. The obtuse suprahumerals. 
Fig. 8 . Pedalionpunctipennis, page 253. 
Fig. 8 a. Frons with spotted metopidium. 
N.B.—Although Pedalion is preoccupied as a generic name, I retain it. on 
account of its descriptive character. As an insect-genus it can scarcely be 
confounded with either a fish or a mollusk. 
