222 MB. J. S. BALY ON THE OOLOMBIATST 



ad nonum ultimoque nigris ; thorace bifoveolato ; elytris crebre punc- 



tatis, limbo externo auguste flavo. Long. 3j lin. 

 Var. A. Antennarum articulo decimo nigro. 

 Mas. Antennarum articulis 3-5 paullo incrassatis. 



Hah. Colombia. 



Head rather loDger than broad, and somewiiat wedge-shaped ; 

 antennse filiform, the third to the fifth joints obsoletely thickened 

 in the male, second and third very short, nearly equal, the fourth 

 longer than the preceding two united. Thorax about one third 

 broader than long ; sides parallel and slightly sinuate from the 

 base to beyond the middle, thence converging to the apes ; disk 

 impressed with two distinct fovese. Elytra oblong, gradually 

 dilated towards the apex, closely punctured. 



22. DiABROTiCA AMABiLis. Elongato-ovata, paUide prasina, nitida ; 

 capite, metapectore, tibiis tarsisque nigris ; antennis sordide fulvis, 

 articulo basali prasino ; thorace subquadrato, dorso bifoveolato ; 

 elytris tenuissime suberebre punctatis. Long. 2| lin. 



Var. A. Antennis piceis. 



Hah. Magdalena Eiver : my collection. Var. A. Coper : coll. 

 H. Sfceiuheil. 



Clypeus clothed with a few silky hairs ; antennge filiform, 

 nearly equal to the body in length, second and third joints very 

 short, equal, the fourth as long as the two preceding united. 

 Thorax subquadrate ; sides straight and parallel, converging at 

 the apex ; disk impressed on either side with a deep fovea. Elytra 

 finely but distinctly punctured, the punctures piceous, not 

 closely crowded, nearly obsolete at the apex. 



In var. A the whole colouring of the insect is darker in all its 

 parts than in the type. 



23, DiABROTiCA siMULANS. Augusts ovata, postice paullo ampliata, 

 convexa, nitida, sordide flava, viridi tincta ; metasterno, tibiis, tarsis, 

 scutello capiteque nigris, antennis pallide piceis ; thorace quam lon- 

 giori paullo latiori, disco medio obsolete tiansversim excavate, leviter 

 bifoveolato ; elytris tenuiter punctatis. Long. 2f lin. 



Hah. Eastern Colombia {Winkler). 



Head longer than broad, wedge-shaped ; vertex impunctate ; 

 front impressed above the encarpse with a deep fovea; encarpse 

 contiguous, subpyriform ; carina raised, linear ; clypeus trans- 

 versely excavated on either side ; antennse filiform, the second and 



