40 Mr. H. W. Bates on the 



elytris fere apicem abdominis attingentibus, angustis, testaceo- 

 flavis, vitreis, marginibus nigris, apice macula oblonga Isete flava. 

 Long. 7-8 lin. d $ • 



Rio Janeiro {coll. W. W. Saunders^ Dr. Baden, and H. W. 



An elongated and narrow but robust form. Head black, 

 coarsely punctured. Antennas about half the length of the 

 body, stout, of equal thickness to the apex, third to fifth 

 joints being much dilated, and the following serrated, dull 

 black. Thorax elongated, cylindrical, closely punctured, sides 

 broadly blood-red, the rest dull black. Scutellum white. 

 Elytra reaching nearly the tip of the body, narrow, and nearly 

 parallel from after the base ; apex sharply truncated, with 

 angles somewhat produced; surface shining, black, with a 

 central vitta straw-colour and vitreous, the black borders 

 coarsely punctured ; an elongate spot brighter yellow at apex. 

 Breast and abdomen sanguineous, the former black in the 

 middle, the latter with margins of the segments black. Legs 

 robust, black ; hind femora with a blood-red ring, and gradu- 

 ally clavate. 



13. Odontocera apicalis, Klug. 



Stenopterus apicalis, Klug, Entom. Bras. Specim. alter, p. 54, t. xliv. 

 f. 6. 



Brazil. 



Apparently allied to 0. sanguinolenta. 



aa. Disk of thorax tuberculated. 



14. Odontocera gracilis, Klug. 



Stenopterus gracilis, Klug, Entom. Bras. Spec. alt. p. 54, t. xliv. f. 7. 

 St. elegans, Guerin-Menev. Icon. R. A. pi. 44. f. 9. 



Brazil. 



It has been suggested that this species should be excluded 

 from the genus Odontocera, on account of its tubercled thorax, 

 the great length of the peduncle of the hind femora, and other 

 characters. Its peculiar facies and metallic colouring ill consort 

 with the other congeners ; but all its essential structural cha- 

 racters are shared in by one or other members of the genus. 

 For instance, the tuberculated thorax is possessed in still 

 higher development by 0. jlavicauda, which has nothing ab- 

 normal in its colouring, and quite moderately clavate and pe- 

 dunculate hind femora. 



15. Odontocera jlavicauda, n. sp. 

 0. elongata, linearis, castaneo-rufa ; capite, antennis basi pedibus- 



