imcharacterised species of Diabrotica. 451 



Diabrotica dimidiaticornis. 

 Late ovata, postice ampliata, convexa, nigra, niticla, autennarum 

 articulis externis qiiatuor elytrisque flavis; his ci'pbre punctatia, 

 utrisque plagis subrotundatis inaguis, diiabus, una ante, altera pone, 

 medium positis, nigris ; thorace transverso, bifoveolato. Long. 

 2i lin. 



Hab. Eastern Ecuador {Buckley). 



Head rather longer than broad, wedge-shaped ; antennae filiform, 

 the four outer joints fulvous; third joint twice the length of the 

 second. Thorax transverse ; sides straight and diverging fi'om the 

 base nearly to the apex, thence obliquely converging to the anterior 

 angle, the latter with an obtuse tubercle ; upper surface punctured 

 along the base, flattened on the hinder disk and rather deeply 

 impressed on either side with a large fovea. Elytra closely 

 punctured. 



Closely allied to IJ. Iminbris, mihi. Separated by the 

 pale apices of the antenna;, and by the more deeply 

 impressed foveas of the thorax. 



Diabrotica lata. 



Late ovata, convexa, dorse subdepressa, nigra, subtus subnitida, 

 supra nitida, antennis extrorsum pallide piceis ; thorace flavo, 

 quam longo plus duple latiori, disco pone medium utrinque oblique 

 foveolato ; elytris subcrebre punctatia, limbo externo late flavo. 

 Long. 3 lin. 



Hob. Peru. 



Antennae slender, filiform, the third joint more than twice the 

 length of the second ; black, the four upper joints pale piceous. 

 Thorax twice as broad as long ; sides straight and very slightly 

 diverging from the base to beyond the middle, thence slightly con- 

 verging towards the apex, the anterior angle produced into a sub- 

 acute tooth ; disk minutely punctured, impressed on either side 

 behind the middle with an oblique fovea. Elytra subquadrate- 

 ovate, slightly dilated posteriorly, broadly rounded conjointly at 

 the apex, slightly flattened along the suture, distinctly punctured ; 

 the outer limb broadly edged with flavous. 



Diabrotica nigrocincta . 

 Subelongata, postice paullo ampliata, nigra, nitida, thonice 

 bifoveolato elytrisque flavo-albidis, his late nigro limbatis anten- 



