110 THOS. L. CASEY. 



Explanation of the Plates. 



Note. — Tlie small vertical marks refer in all cases to the length of the entire 

 insect, and never to the part to which they may be attached. 



PLATE IV. 

 Fig. 1. Silvanus Hurinamensis. 



1 a. — Antenna. 

 Fig. 2. S. bidentatus. 



2 a. — Antenna. 



2 b. — Under surface of head. 



2 c. — TarsTis. 



2 d. — Maxillary palpus. 



2 e. — Punctuation of surface near seutellum. 

 Fig. .'!. S. planatiis. ' ■ 



Fig. 4. 8. imheUis. 

 Fig. 5. S. qiiadricoUts. 



5 a. — Antenna. 



h b. — Mandible. 

 Fig. f). S. adrena. 



t) a. — Antenna. 

 Fig. 7. S. rectus. 



7 a. — Antenna. 

 Fig. 8. S. opaculus. 



S a. — Antenija. 

 Fig. 9. Nansibius dentatus. 



9 a. — -Antenna. 



9 6. — Middle tarsus. 



9 c. — Maxillary palpus. 

 Fig. 10. N. repaiidus. 



10 a. — Antenna. 



Note. — The lines on the prothorax of this figure are not intended for striae, but 

 simply to mark the line along which the surface becomes rapidly declivous. 

 Fig. 1 1 . Scalidia linearis. 



1 1 a. — Antenna. 



1 1 6.— Tarsus. 



F'ig. 12. Prostomis americana. 



12 a. — Antenna. 



12 b. — Under surface of head showing jugular prf>ces8es. 

 Fig. \?>. Nar'thecius grandiceps. 



13 a. — Tarsus. 



13 6. — Maxillary palpus. 



PLATE V. 



Fig. 1. Narthecius grandiceps. — Head enlarged. 



1 a. — Under surface of head showing incipient jugular plates. 



1 b. — Antenna. 

 Fig. 2. Catogenus rufus. 



2 a. — Anterior tarsus. 

 Fig. 3. Cucujus puniceus. 



