Having spent many happy hours with the lamented author in the examination of the beautiful forms of which this book treats, I have felt it a pleasant thing to be associated, even in so humble a capacity, with its introduction to the Entomological world; and the little service I have had the privilege of rendering in the revision of the proof-sheets of the latter half of the work, has been quite a labour of love enabling me to offer a slight testimony of affection to a kind friend, and of my personal interest in that family of the Coleoptera which had first attracted my attention by the singular loveliness of its numerous species.