The new species Ocyochterus irmae is described from the Andes Mountains of Colombia and adjacent Ecuador. This species is only the second known in the genus, and the first in which male specimens have been available for dissection of the genitalic structures. A new record is also provided for the previously described O. victor (Bolivar), constituting only the fourth known specimen of this taxon since the original description in 1879, and the first new collection in over 90 years. Color photographs of the dorsal habitus and anterior head are presented for both O. irmae and O. victor, as well as photographic figures of the male parameres, aedeagus, proctiger and pygophore for O. irmae, representing the first illustrations of the male genitalic structures in this genus. A distribution map for O. irmae and O. victor is also provided.