Whewell, Dr., on the natural causes which science has to investigate, 191.

White-Cabbage Butterfly, varies in Nepaul and Japan, 34.

On the Variation of Species, with Especial Reference to the Insecta ; Followed by an Inquiry into the Nature of Genera — Part 106

Winds, the effects of, in the diffusion of insects, 148.

On the Variation of Species, with Especial Reference to the Insecta ; Followed by an Inquiry into the Nature of Genera — Part 106

Wings of insects, subject to undue development in hot seasons, 43; liable to become gradually obsolete in islands, 81; more variable than other organs, 97.

On the Variation of Species, with Especial Reference to the Insecta ; Followed by an Inquiry into the Nature of Genera — Part 106

_Xenostrongylus_, its geographical distribution, 124; common to Madeira and Sicily, 139.

_Zargus pellucidus_, Woll., variety of, on one of the Madeira Islands, 88.

Printed by Taylor and Francis, Red Lion Court, Fleet Street.

Lately published, by the same Author, in large 4to (with Thirteen Coloured Plates), price £2 2_s._,

INSECTA MADERENSIA; BEING AN ACCOUNT OF THE INSECTS OF THE ISLANDS OF THE MADEIRAN GROUP.

London: JOHN VAN VOORST, 1, Paternoster Row.

Inconsistent/archaic spelling and punctuation left as in original.

End of the Project Gutenberg EBook of On the Variation of Species, with Especial Reference to the Insecta ; Followed by an Inquiry into the Nature of Genera, by Thomas Vernon Wollaston