which aro now relegated to the synonymic lists. "With regard to 

 the types of Trochilidffi, their number cannot bo given with absolute 

 certainty, as Gould did not always i^ay regard to distinctive label- 

 ling or to the preservation of individual specimens which he would 

 have wished to be regarded as the types of the species named and 

 described by him. 



The Authors beg to acknowledge with many thanks the assistance 

 they have received, chiefly by the loan of specimens for the purposes 

 of comparison, from the United States National Museum, the Free 

 Pulilic Museum of Liverpool, Graf von J5erlepsch, the Hon. 

 AValter Eothschild, Mr. J. A. Allen of the American Museum of 

 Natural History, Professor 11. Hertwig of the Munich Museum, 

 H. Seebohm, Esq., Count T. Salvadori, Dr. Pleske, M. Jean Stolz- 

 mann, Professor Nasonoff, Dr. Biittikofer, Dr. A. B. Meyer, Professor 

 Lamport of the Stuttgart Museum, Canon Tristram, and others. 



ALBERT GiJNTlIER, 



Kcejier of the Dejiart)nent of Zoologi/. 



Brilish Museum (X.II.), 

 June ]± IS'Jl'. 



