Oxypogon guerinii cyanolaemus -- Bearded Helmetcrest. Alternate name on piece: Oxypogon cyanolaemus Very rough layout drawing, an irregular fragment torn from a full sheet, and preserving one bird and part of a second. The species is given with the authority of Ibis, April 1880, and there is a remnant of what appears to be a Curtis citation, "3rd series, v.12." Artist's name(s): Gould, John; Hart, William Matthew.