Resumen:
A new species, Reticulolaelaps caditanus n. sp., is described based on adult females found in an oothecal cell of Mantis religiosa. The species has several morphological characteristics, including the presence of presternal shields, endopodal III-IV widely connected with sternal shield, 50 pairs of dorsal setae and at least 11 setae "x", curly and barbed, and thin and smooth ventral setae including six pairs of setae on the genitoventral shield. A revised diagnosis of the genus with the addition of new characters and a key to the world species of the genus are provided.