Agradecimentos: We are grateful to J. Hogan and P. Izar for inviting us to contribute to this special issue, and to D.E. Wheeler and M. Lanan forhelpful suggestions on the manuscript. The final version was con-siderably improved by comments from two anonymous referees. R

The arboreal ant Odontomachus hastatus nests among roots of epiphytic bromeliads in the sandy forest at Cardoso Island (Brazil). Crepuscular and nocturnal foragers travel up to 8 m to search for arthropod prey in the canopy, where silhouettes of leaves an

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

304521/2006-0; 301853/2009-6; 306115/2013-1

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

07/52974-8; 2011/18580-8; 2012/23671-5

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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