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Show 1889.] COLEOPTERA OF T H E GENUS DIABROTICA. 91 16. DIABROTICA LIMITATA, sp. nov. Ovata, postice ampliata, convexa, flava, nitida ; pectore, tibiis, tarsis capiteque nigris ; antennis basi piceis, apice albidis; thoraceflavo-rufo, disco late excavato, leviter trifoveolato, fovea intermedia minus distincta, interdum obsoleta ,* scutello piceo ; elytris sat crebre punctatis, pallide flavis, utrisque linea suturali et vitta submarginali, apicem versus abbreviatis, necnon lineis duabus transversis, una vix ante medium, secunda inter medium et apicem, plerumque cum vitta submarginali connexis, nigris. Long. 4 lin. Hab. Eastern Ecuador. Section II.-Third joint of antennse equal in length or to the fourth. 17. DIABROTICA TUBERCULATA, sp. nov. Sat late ovata, postice paullo ampliata, convexa, subtus cum scutello capiteque nigris, antennis apice sordide fulvis ; thorace elytrisque jlavis, Mo urcuatim excavato, et utrinque puncto nigro parvo notato, his tenuiter punctatis, utrisque plagis magnis duabus, una ad basin, altera pone medium nigris. Mas. Elytris ante apicem juxta suturam tuberculo conico valido instructis. Long. 3 lin. Hab. Eastern Ecuador. 18. DIABROTICA HEMIXANTHA, sp. nov. Ovata, postice ampliata, convexa, nigra, nitida; femoribus basi, thorace elytrorumque dimidio antico flavis ; thorace leviter transversim sulcato ; elytris distincte punctatis, punctis apicem versus fere obsoletis. Var. Pedibus totis nigris. Long. 3 lin. Hab. Upper Amazons. 19. DIABROTICA INTERRUPTO-LINEATA, sp. nov. Ovata, postice ampliata, convexa, fulvo-flava, nitida; pectore, scutello, capitis vertice, ore antennisque nigris, his apice albidis ; thorace leevi; elytris crebre punctatis, flavis, utrisque linea discoidali, infra basin late interrupta et longe ante apicem abbreviata, alteraque sublaterali, a basi fere ad apicem extensa, nigris. Long. 3| lin. Hab. Brazil. 20. DIABROTICA NOTATICOLLIS, sp. nov. Anguste ovata, postice ampliata, convexa, flava, nitida; pectore, femoribus,dorso,tibiis posticis, tarsis, antennis (basibus exceptis), |
