A new riodinid species in the tribe Symmachiini, Lucillella arcoirisa Hall & Willmott n. sp., is described from the eastern Andes of Ecuador. All five true members of the genus Lucillella Strand, 1932, are figured, and their known geographic ranges are mapped. Lucillella is hypothesized to be monophyletic with the exclusion of suberra Hewitson, 1877, and the sister genus is hypothesized to be Esthemopsis C. & R. Felder, 1865. The new Lucillella species was discovered in the forest canopy using the single rope technique. The equipment and procedures used in this canopy access method are described and illustrated.