Neomida diminuta sp. n. is described, based on a single male specimen from Colombia, and a redescription of Neomida suilla (Champion) is given. Data on the morphology of the aedeagus for both species, and on the female abdominal terminalia for Neomida suilla are provided. New records of Neomida suilla from Atlantic Forest remnants in the states of Espírito Santo and Minas Gerais, Brazil are given.