Discosura popelairii -- Wire-crested Thorntail. Alternate name on piece: Gouldia popelairi Litho proof, colors roughly indicated; some details are marked, but no changes appear to have been made in the published plate; "Plant / Loasa picta." Title in pencil by Sotheran, bookseller. Artist's name(s): Gould, John; Richter, Henry Constantine.