SPECIES 01' THE GENUS DIABKOTICA. 249 



Hab. Cayenne (type) ; vars. A and B, Colombia. 



Head longer than broad, trigonate ; face in the male with a 

 large concave smooth excavation, vphich occupies the upper two 

 thirds of the cljpeus ; antennae in the same sex slightly more 

 robust than in the female, the fourth and following joints slightly 

 compressed on their inner edge, the latter obsoletely carinate ; 

 in the female the antennae are simple, the clypeus being trans- 

 versely convex, and obsoletely carinate at its base. Thorax 

 one half broader than long ; sides straight and nearly parallel 

 from the base to the middle, thence obliquely converging towardit 

 the apex ; disk smooth, impressed on either side with a shallow 

 transverse fovea. Elytra oblong, slightly dilated towards the 

 apex, the latter obtuse ; above convex, finely but distinctly- 

 punctured. 



Narrower and less convex than D. heata ; most similar 

 in shape to D. clypeata, but differing from that insect in the more 

 slender antennae in the male, in the finer punctuation of the elytra, 

 and in the entirely difi'erent coloration. This species is usually- 

 placed in the genus Cerotoma. 



75. Dl'ABROTiCA CLYPEATA. Ovata, postice paullo ampliata, valde 

 convexa, nigra, nitida j abdomine, pedibus antennisque flavis, his apice 

 infuscatis; thorace rufo-fulvo, leviter bifoveolatoj elytris oblongis, 

 apicem versus paullo ampliatis, apice obtusis ; eonvexis, sat fortiter, 

 subcrebre punctatis ; flavis, utrisque maculis tribus, duabus iafra basin, 

 transversim positis, tertia ante apicem, subquadrata, fasciaque prope 

 medium, utrinque abbreviata, nigris. Long. 3 lin, 



Mas, Facie inferiori profunde et late excavata ; antennarum articulo ter- 

 tio quam quartus vix breviori, quarto et sequentibus intus paullo com- 

 pressis, carinatis. 



Sab. Colombia : my collection. 



Head rather longer than broad, trigonate ; whole of the lower 

 face with a large, smooth, concave excavation, which extends up- 

 wards as far as the base of the antennae, the latter more robust 

 thanin D. Icsta, the fourth joint distinctly longer than the third; 

 inner edge of the fourth and following joints compressed, narrowly 

 carinate. Thorax nearly one half broader than long ; sides nearly 

 parallel and slightly sinuate from the base to beyond the middle, 

 thence converging towards the apex ; transversely convex, disk 

 impressed on either side with a distinct but shallow fovea. Ely- 

 tra convex, rather strongly but not very closely punctured. 



