Oxychalepus alienus is a species of beetle of the family Chrysomelidae. It is found in Colombia, Costa Rica, El Salvador, Honduras, Mexico, Nicaragua, Panama and Venezuela.
Description Adults reach a length of about 7.6–9 mm. They are yellowish, with a black head, antennae and legs. Both the pronotum and elytron have black markings.
Biology They have been recorded feeding on Centrosema macrocarpum and Cassia fruticosa.
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