Resumo. The association between the assassin bug Zelus versicolor (Herrich-Schäffer) (Hemiptera, Reduviidae, Harpactorinae) and the plant Bidens rubifolia Kunth (Asterales, Asteraceae) is related. Associação entre Zelus versicolor (Herrich-Schäffer) (Hemiptera, Reduviidae, Harpactorinae) e Bidens rubifolia Kunth (Asterales, Asteraceae) Resumo. Relata-se a associação entre o percevejo predador Zelus versicolor (Herrich-Schäffer) (Hemiptera, Reduviidae, Harpactorinae) e a planta Bidens rubifolia Kunth (Asterales, Asteraceae).