248 ME. J. S. BALT OK THE COLOMBIAW 



second joint subclavate, the third scarcely twice its length, and. 

 the fourth, which is very slightly curved at its base, longer than 

 the two united ; in the $ these organs are more slender, and the 

 third joint is twice the length of the second, being only slightly 

 shorter than the fourth. Thorax about one half broader than 

 long ; sides nearly parallel and slightly sinuate from the base 

 to beyond the middle, thence obliquely converging towards the 

 apex, the hinder angle acute ; disk finely but remotely punctured, 

 deeply bifoveolate. Elytra strongly convex, subventricose, trans- 

 versely excavated below the basilar space ; surface strongly sub- 

 seriate-punctate, iri'egularly wrinkled towards the apex ; each 

 elytron with four or five longitudinal costae, which commence 

 below the basilar space and extend nearly to the apex. 



The difference in the excavation of the face in the J , together 

 with the more distinctly raised vittse on the elytra, will separate 

 this species from its congeners. 



73. DiABEOTicA Stevensi. 



Cerotoma DeyroUii, Baly, Trans. Ent. Soc. 1866, p. 477- 



Hal. Colombia, Magdalena Eiver ; Venezuela, Bogota. 



In the first instance I erroneously placed this species in Cei'o- 

 toma ; having subsequently discovered my mistake and ascertained 

 that the insect belongs to the present genus, I am compelled to 

 alter the specific name, Deyrollei having already been used by 

 myself for a species (also from Colombia) described in the Trans- 

 actions of the Entomological Society for 1865, p. 347. 



I know three female specimens of this species ; in all the third 

 and fourth joints of the antennae are equal in length ; the male 

 is unknown to me. 



74. DiABEOTICA LJ<!TA, Fa'b7\ Si/st. El. \. p. 454. 



Ovata, postice ampliata, valde convexa, nigro-picea, nitida; scutello, tbo- 

 race capiteque piceo-fulvis ; pedibus antennisque flavis, his extrorsura 

 nigris; thorace Isevi, utrinque transversim foveolato ; elytris late ob- 

 longis, postice paullo ampliatis, apice obtusis; convexis, subcrebre 

 punctatis ; nigris ant nigro-piceis, utrisque limbo externo, fascia prope 

 medium, sutuia ])Oiie fasciam, nee non maculis una vel duabus infra 

 basin flavis. Long. 2% lin. 



Var. A. Elytrorum vitta suturali fere ad basin extensa. 



Var. B. Elytrorum vitta suturali obsoleta. 



Mas. Facie inferiori late et profunde excavata ; antennis filiformibus, 

 articulo tertio quam quartus paullo breviori ; articulis quarto et sequen- 

 tibus intus compressis, carinatis. 



