The butterflies of the eastern United States and Canada : with special reference to New England
Scudder, Samuel Hubbard, 1837-1911; Davis, William Morris, 1850-1934; Woodworth, Charles William, 1865-; Howard, L. O. (Leland Ossian), 1857-1950; Riley, Charles V. (Charles Valentine), 1843-1895; Williston, Samuel Wendell, 1851-1918