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Show MR. J. S. BALY ON NEW [Mar. 5, . Descriptions of new South-American Coleoptera of the Genus Diabrotica. By JOSEPH S. B A L Y , F.L.S. [Received February 15, 1889.] Section I.-Fourth joint of antennas equal in length to the preceding two united. 1. DIABROTICA CONTIGUA, sp. nov. Elongata, postice ampliata, convexa, flava, nitida ; pectore, scutello capiteque nigris, antennis basi et apice flavis; thorace trifoveolato, interdum piceo tincto ; elytris sat crebre punctatis, sulcis longitudinalibus nonnullis leviter impressis, costa fere ad apicem extensa, utrisque linea suturali, apicem abbreviata, apice paullo ampliata, vitta humerali a fere ad apicem extensa, maculaque discoidali pone medium nigris. Long. 3 lin. Hab. Brazil. 2. DIABROTICA MELANOPYGA, sp. nov. Elongata, postice paullo ampliata, convexa, jiava, nitida; pectore, abdominis apice, tibiis et tarsis posticis necnon capite antennis basi et ante apicem flavis ; thorace bifoveolato, scutello, tibiis tarsisque quatuor anticis piceis; elytris subcrebre utrisque linea suturali, postice attenuata et ante obsoleta, macula parva apicali vittaque humerali fere ad apicem extensa, nigris. Long. 2f lin. Hab. Brazil. 3. DIABROTICA EXTENSA, sp. nov. Subelongata, postice ampliata, convexa,flava, nitida ;pectore, labro antennisque (his apice exceptis) nigris; thorace excavate, utrinque obsolete foveolato ; elytris subrugulosis, crebre punctatis, obsolete longitudinaliter sulcatis, costa fere ad apicem. extensa, utrisque linea suturali, postice vittaque sublaterali super costam humeralem posita, Long. 2| lin. Hab. Brazil. 4. DIABROTICA NITIDICOLLIS, sp. nov. Subelongato-ovata, postice paullo ampliata, convexa, flava, nitida pectore, scutello capiteque nigris, antennis apice flavis ; convexo, leevi, fulvo-rufo ; elytris leviter sat crebre punctatis, subrugulosis, costa subhumerali longe pone medium extensa, utrisque linea suturali fere ad apicem product a, linea humerali ante apicem abbreviata, maculaque parva discoidali pone medium posita, nigris. Var. Elytrorum macula discoidali obsoleta. Long. 3 lin. Hab. Brazil. |