88 MR. J. s. BALY ON NEW [Mar. 5, 



1. Descriptions of new South- American Coleoptera of the 

 Genus Diabrotica. By Joseph S. Baly, F.L.S. 



[Eeceived February 15, 1889.] 



Section I. — Fourth joint of antennas equal ia length to the 

 preceding two united. 



1. Diabrotica contigua, sp. nov. 



Elongata, post ice ampliata, convexa, jiava, nitida ; pectore, scutello 

 capiteque nigris, antennis basi et apice flavis ; thorace leviter 

 trifoveolato, interdum piceo tincto ; elytris sat crebre punctatis, 

 sulcis longitudinalibus iionnullis leviter impressis, casta sub- 

 humerali fere ad apicem extensa, ufrisque linea suturali, ante 

 apicem abbreviata, apice paullo ampliata, vilta humerali a basi 

 fere ad apicem extensa, maculaque discoidali pone medium nigris. 



Long. 3 lin. 



Hah. Brazil. 



2. Diabrotica melanopyga, sp. nov. 



Elongata, postice paullo ampliata, conve.va, fava, nitida; pectore, 

 abdominis apice, tibiis et tarsis posticis necnon capite nigris, 

 antennis basi et aiite ajncem flavis ; thorace bifoveolato, scutello, 

 tibiis tarsisque quatuor anticis piceis ; elytris subcrebre puncta- 

 tis, utrisque linea suturali, postice attenuata et ante apicem 

 obsoleta, macula parva apicali vittaque humerali fere ad apicem 

 extensa, nigris. 



Long. 2\ lin. 



Hab. Brazil. 



3. Diabrotica extensa, sp. nov. 



Subelongata, postice ampliata, convexa, Jlava, nitida ; pectore, oculis, 

 labro antennisque (his apice exceptis) nigris ; thorace leviter 

 excavato, utrinque obsolete foveolato ; elytris subrugulosis, sat 

 crebre punctatis, obsolete longitudinaliter sulcatis, costa subhume- 

 ralifere ad apicem extensa, utrisque linea suturali, postice abbre- 

 viata, vittaque sublaterali super costam humeralem posita, nigris. 



Long. 2| lin. 



Hab. Brazil. 



4. Diabrotica nitidicollis, sp. nov. 



Subelongato-ovata, postice jiaullo ampliata, convexa, fiava, nitida ; 

 pectore, scutello capiteque nigris, antennis apice flavis; thorace 

 convexo, Icevi, fulvo-rufo ; elytris leviter sat crebre punctatis, 

 subrugulosis, costa subhumerali longe pone 7nedium extensa, 

 utrisque linea suturali fere ad apicem producta, linea humerali 

 ante apicem abbreviata, maculaque parva discoidali pone 

 medium posita, nigris. 



Var. Elytrorum macula discoidali obsoleta. 



Long. 3 lin. 



Hab. Brazil. 



