I copied the text of Vieillot's entry on the Hyacinthine macaw in

I made a quick visit to the Natural History Museum library in London today between business appointments and managed to copy the text of Vieillot's entry on the Hyacinthine macaw in La Galerie des Oiseaux published in 1825 in Paris. You can view it here. It raises some questions as the description is rather more of a Glaucous Macaw although the accompanying plate looks more like a Lear's macaw.