Colibri delphinae -- Brown Violet-ear, Brown Violetear. Alternate name on piece: Petasophora iolata Layout drawing, rough and muddy, color added; background changed in published plate; at head of sheet: "Biddolph, son of Sir Ralph Biddolph" (rest of note indecipherable because of torn corner).Title in pencil by Sotheran, bookseller. Artist's name(s): Gould, John; Richter, Henry Constantine.