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Ir fell to my lot, on Mr. Gouxn’s death, to complete the present work together with the
others left unfinished at the time of his decease. ‘The Plates for this ‘‘ Supplement” were
nearly all drawn during the lifetime of Mr. Gould; to these I have added certain others as
representing species well worthy of illustration, the specimens having been lent to me by
Mr. Osbert Salvin. It will be noticed that a large number of species are included in the present
“ Supplement ” without the accompanying plates. Whether it was the intention of Mr. Gould
to have enumerated these in the work I know not; but as he originally meant to complete
the “Supplement” in four parts, I fancy that he would only have figured the most striking
of the species described since the completion of the ‘Monograph.’ I have, however,
endeavoured to include in this supplementary volume descriptions of all the species of
Trochilidee discovered since 1861, when the ‘ Monograph’ was finished ; and this course will,
I trust, commend itself to ornithologists. My thanks are due to Messrs. Sotheran for allowing
me thus to render the work as complete as possible, notwithstandmg the pecuniary loss

involved by such a proceeding.

It is scarcely necessary for me to record here my obligations to Mr. Elliot’s admirable
‘ Synopsis of the Humming-Birds,’ as the pages of this book reveal how much I have been
indebted to his volume; and to Mr. Salvin J owe the deepest acknowledgment, for his

advice in planning the present work and for having supervised the proofs of each Part.

R. BOWDLER SHARPE.

Brivish Museum (Narurau History),
Soutn KENSINGTON,

March 1887.