The genus Ischioscia Verhoeff, 1928 is one of the most diverse genera in the Philosciidae Kinahan, 1857. To date, the genus comprises 26 species distributed in tropical and subtropical areas of the Neotropical region. In this work three new species from Serranía de Perijá, Andean Cordillera, Colombian Caribbean, are described: Ischioscia herrerai López-Orozco, Carpio-Díaz & Campos-Filho n. sp., Ischioscia perijaensis Carpio-Díaz, López-Orozco & Campos-Filho n. sp. and Ischioscia unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp. In addition, an identification key for all species of the genus is given.