Zelus longipes is an assassin bug (Reduviidae) that is a member of the harpactorinae subfamily. Its distribution ranges include southern North America, Central America, and South America (except Chile), especially in agroecosystems in Brazil.
Z. longipes has been considered as a potential biocontrol agent, as it prefers caterpillars of Spodoptera frugiperda, which is a moth that is a pest in cornfields. Z. longipes prefers smaller caterpillars, probably because there is less risk of injury while subduing smaller prey.
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- R. Cogni, A. V. L. Freitas and B. F. Amaral Filho. "Influence of prey size on predation success by Zelus longipes L. (Het., Reduviidae)" (PDF). J. Appl. Ent. 126, 74–78 (2002).