SPECIES OF THE GENFS DIABEOTICA. 233 



punctured on the outer disk, the puncturing finer near the 

 suture ; outer disk with several distinctly raised longitudinal 

 costse, which commence below the humeral callus and extend 

 nearly to the apex of the elytron, gradually^ becoming less 

 distinct before their termination ; the punctures between these 

 costge irregularly arranged in double rows ; disk black, the outer 

 balf of the basal limb, the entire outer margin, together with a 

 smooth slightly raised subsutural vitta (which corresponds to 

 the third costa in the preceding species), connected at base 

 and apex with the limb, yellowish white. 



The pale head separates this species from D. hivittata, Kirsch, 

 to which insect it is in all other characters closely allied. D. hi- 

 vittata (which has a black head) ranges from Brazil to Ecuador; 

 the present species, as shown above, is found in Colombia and 

 the Amazon region. I have received numerous specimens from 

 the latter locality, and in all the colour of the head is constant. 



B. Elytra elevate-vittate, coarsely rugose-punctate 



between the vittse. 



43. DiABEOTICA CORTPH^A. 



Diabrotica pimcticollis, \?a\, Kirsch, Berlin. Ent. Zeit. xxvii. 1883, 

 p. 203. 



Ovata, postice ampliata, convexa, flava, nitida ; capit.e, autennis apice, 



scutello pectoreque nigris ; thorace transverse, profunde bifoveolato ; 



elytris elevato-vittatis, rude rugoso-punctatis, subopacis, nigris, raar- 



gine externo (in S ad apicem dilatato) flavo. Long. 3 lin. 

 Mas. Elytris utrisque tuberculo magno, intus excavate, ad apicem prope 



suturam posito, instructis. 



Rah. Coper; Tusagasuga : coll. Steinheil. Magdalena Kiver : 

 my collection. 



Head scarcely longer than broad, trigonate ; vertex subrugose- 

 punctate ; clypeus granulose-punctate, its medial line with a 

 longitudinal ridge. Antennae slender, filiform, third joint twice 

 the length of the second, nearly equal in length to the fourth in 

 the male, rather shorter in the female ; pale flavous, the three 

 outer joints black. Thorax nearly twice as broad as long ; sides 

 diverging from the base to the apex, slightly sinuate behind the 

 middle, smooth, impressed in some specimens with a few fine 

 punctures ; disk with two large deep f ovese, which are only sepa- 

 rated by a narrow longitudinal space. Elytra oblong, gradually 



