The butterflies of the eastern United States and Canada
Scudder, Samuel Hubbard, 1837- [from old catalog]; Davis, William Morris, 1850-1934; Woodworth, Charles William, 1865- [from old catalog]; Howard, Leland Ossian, 1857- [from old catalog]; Riley, Charles Valentine, 1843-1895. [from old catalog]; Williston, Samuel Wendell, 1852- [from old catalog]