Butterflies of Britain & Europe - Tolman, Tom (HarperCollins, 1997)

The butterflies of Europe described and figured. Rhopalocera Europae descripta et delineata - Lang, Henry C. (L. Reeve, 1884)

The butterflies of India, Burmah and Ceylon. A descriptive handbook of all the known species of rhopalocerous Lepidoptera inhabiting that region, with notices of allied species occurring in the neighbouring countries along the border; with numerous illustrations - Marshall, G. F. L. (George Frederick Leycester), 1843 -1934 (Central Press Co., ld, 1886)

The butterflies of Montana : with keys for determination of species - Elrod, Morton J. (Morton John), 1863 -1953 (University of Montana, 1906)

The butterflies of North America - Edwards, William H. (William Henry), 1822 -1909 (American Entomological Society, 1868)

The butterflies of Switzerland and the Alps of central Europe - Wheeler, George, 1858 -1947 (Eliott Stock, 1903)

The butterflies of the British Isles - South, Richard, 1846 -1932 (F. Warne, 1906)

The butterflies of the eastern United States and Canada : with special reference to New England - Riley, Charles V. (Charles Valentine), 1843 -1895 (The author, 1889)

The butterflies of the eastern United States and Canada with special reference to New England - Scudder, Samuel Hubbard, 1837 -1911 (S.H. Scudder, 1889)

The butterflies of the west coast of the United States; illustrated with 940 figures in color-photography of butterflies from the west coast, nearly all of which were captured by the author, with accurate data for each specimen; with colored figures and descriptions of many new species and new varieties now first published - Wright, W. G. (William Greenwood), 1830 -1912 (The Whitaker & Ray Company (Incorporated), 1905)

The butterflies of the West Coast of the United States : with colored figures and descriptions of many new species and new varieties now first published - Wright, W. G. (William Greenwood), 1830 -1912 (Wright, 1905)

Butterflies; their structure, changes and life-histories, with special reference to American forms. Being an application of the "Doctrine of descent" to the study of butterflies. With an appendix of practical instructions - Scudder, Samuel Hubbard, 1837 -1911 (H. Holt and company, 1881)

Butterflies worth knowing, by Clarence M. Weed... - Weed, Clarence Moores, 1864 -1947 (Doubleday, Page & company, 1917)

The butterfly book : a popular guide to a knowledge of the butterflies of North America - Holland, W. J. (William Jacob), 1848 -1932 (Doubleday, Page, 1898)

The butterfly book : a popular guide to a knowledge of the butterflies of North America - Holland, W. J. (William Jacob), 1848 -1932 (Doubleday & McClure, 1899)

The butterfly book : a popular guide to a knowledge of the butterflies of North America - Holland, W. J. (William Jacob), 1848 -1932 (Doubleday, 1902)

The butterfly book : a popular guide to a knowledge of the butterflies of North America - Holland, W. J. (William Jacob), 1848 -1932 (W. Briggs, 1898)