Mr. Westwoon's Synopsis of the Genus Cerapterus. 585 
Subgenus 6. PLEUROPTERUS. 
Caput thorace dupld angustius. Antenne elongatæ subplanæ, articulo se- 
cundo extùs in angulum acutum producto. Palpi elongati ; labiales arti- 
culo ultimo crassiori vix securiformi. Labium maximum, rigidum. Tho- 
rax elytrorum latitudine, lateribus margine elevato posticé valdé sinuato 
utrinque in auriculam producto. Elytra oblongo-quadrata, basi bicos- 
tata. Pedes elongati, graciles, tarsis latis subtüs setosis. 
Species 1. (8.) CERAPTERUS [PLEUROPTERUS] WESTERMANNI. 
C. rufo-piceus, haud nitidus; elytris nigris postice cruce rufescenti notatis, basi 
bicostatis, disco longitudinaliter subimpressis, apice rufescentibus. 
Long. corp. lin. 44. Lat. lin. 15. 
Habitat in insulá Java. In Mus. D. Westermanni, cujus nomine hanc spe- 
ciem admodüm singularem animo grato inscripsi. 
EXPLANATION OF THE FIGURES. 
Tas. XSI, CC 
a. Cerapterus | Homopterus] brasiliensis, seen from above and magnified. 
b. Ditto, seen in profile. c. Head, seen from front. d. Mandibles. 
e. Maxillary palpi. fff. Labial palpi, seen in different positions. 
g. Antenna, seen from above. A. Ditto, seen sideways. i. Trans- 
verse section of one of the joints of the antenna. A. One of ditto, 
seen from above. J. Fore foot. m. Hind-foot. x. Tarsus. 
