Loxia leucoptera -- Two-barred Crossbill; White-winged Crossbill, bec-croisé bifascié, [American white-winged crossbill] Layout drawing, birds well finished; 2 notes on form; 2 marginal sketches on breast and wing form; "Larch" [background]. Title in pencil by Sotheran, bookseller. Artist's name(s): Gould, John; Richter, Henry Constantine.