Seventeen new species are proposed in the generaAda, Gongora, Kefersteinia, Lockhartia, Lycaste, Macroclinium, Oncidium, Polycycnis, Scelochilus, andTrichosalpinx. All new species are illustrated. A key toKefersteinia in Peru is presented. The description ofOncidium boliviense is emended, and the species is illustrated for the first time.