South American species of Diabrotica. 8 



D. Elytra black, with linear or irregular flavous markings. 



Spec. 32, 33. 



— 9, var. 



E. Elytra flavous, each with the suture at the base and several irregular 



discoidal markings, one humeral, one medial and one or 

 two post-medial, piceous or black. 

 Spec. 34—37. 



F. Elytra flavous, with irregular black markings, placed without order 



on the disk and frequently confluent. 

 a. Black markings scattered over the whole surface, the hinder disk 



sometimes excepted. 

 Spec. 38— 4(). 



— 9 and 33 vars. 



aa. Black markings post-medial. 

 Spec. 1, 2 vars. 



G. Elytra prasinous or flavous, with small black spots placed trans- 



versely in pairs; these spots sometimes confluent and 

 forming linear fascias. 

 Spec. 41—47. 

 H. Elytra rufo-testaceous, the outer limb, dilated at the apex, flavous, 

 the suture at the base and a humeral spot black. 

 Spec. 48. 

 I. Elytra flavous, each with two annuli (often interrupted), one basal, 

 the other post-medial, black or cyaneous. 

 Spec. 49—58. 

 J. Elytra flavous or prasinous, the base to a greater or less extent, 

 together with one or two patches or transverse bands, black 

 or cyaneous. 



a. Each elytron with two transverse bands, one before the other 



behind the middle, black. 



Spec. 54. 



a a. Elytra with a single post-medial fascia, usually abbreviated at 

 the suture, black or cyaneous. 



Spec. 55—63. 

 K. Elytra flavous or prasinous, each with two short basal spots or wedge- 

 shaped vittffi, the inner one common, together with a post- 

 medial patch or fascia black. 



Spec. 64—66. 

 L. Elytra prasinous, variegated with flavous ; this latter colour in some 

 species forms regular spots or patches, in others its limits 

 are ill-defined, it becoming gradually lost in the ground 

 colour of the disk ; occasionally it covers nearly the entire 

 surface. 



rt. Antenme thickened in the ^ . 



Sp. 07, 68. 



a a. Antennas filiform in both sexes. 



b. Elytra with black or piceous markings, which often nearly conceal 



the flavous spots. 

 Spec. 69—72. 

 — 73, var. b. 

 bb. Black or piceous markings on elytra obsolete, the flavous spots 



sometimes stained or margined with rufo-testaceous. 



c. Elytra not grooved or plicate below the humeral callus. 

 Spec. 73, 74. 



B 'A 



