Lampornis castaneoventris cinereicauda -- White-throated Mountain-gem, White-throated Mountaingem. Alternate name on piece: Oreopyra cinereicauda Drawing on tissue, watercolor added. Birds well drawn, plant roughly sketched. The birds appear to have been modified and the type of plant changed for use in Monograph of the Trochilidae, or family of hummingbirds Supp: 7 (see Gould item 1685). See further drawing, Gould item 2156. Artist's name(s): Gould, John; Hart, William Matthew.