590 MESSRS. SCLATER AND SALVIN ON [Julie 17, 



form of a "Synopsis" in the 'Magasin de Zoologie' for 1837 and 

 1838, and subsequently in a more extended form in his great work 

 entitled 'Voyage dans l'Amerique meridionale,' of which the "Birds" 

 form the third part of the fourth volume. Unfortunately, the 

 account of d'Orbigny's birds was never completed, the " Synopsis " 

 only proceeding as far as the Accipitres, Passeres, and Picariae, and the 

 'Voyage' being not quite so nearly perfect. In the remaining classes 

 of birds many of d'Orbigny's discoveries have been since published 

 by subsequent authors. 



(2) In 1845-47 Mr. Thomas Bridges, a well-known Corresponding 

 Member of this Society, collected in Bolivia for the late Earl of 

 Derby, and sent home a large number of birds, which are now in 

 the Derby Museum at Liverpool. Other specimens of the same 

 collector found their way, through Mr. Bridges's agent Mr. Hugh 

 Cuming, into the British Museum and other collections ; but the 

 localities attached to these specimens are not always trustworthy, as 

 the Bolivian collections were mixed up by Mr. Cuming with those 

 previously sent home by Mr. Bridges from Chili and Mendoza. Two 

 letters of Mr. Bridges will be found in the Society's ' Proceedings ' 

 for 1846 and 1847 1 . Unfortunately no general account of Mr. 

 Bridges's excellent collections was ever prepared or published. 



(3) Mr. J. B. Pentland, who was for some years H.B.M. Consul 

 in Bolivia, collected many birds and other objects of natural history, 

 some of which are now in the British and French national collec- 

 tions". These also have never been worked out. 



(4) The Polish naturalist, M. Warszewiez, of Warsaw, explored 

 the eastern slopes of Ulimani and Sorata about 1852-53, and dis- 

 covered some brilliant Humming-birds, which were described by Mr. 

 Gould in the Society's 'Proceedings' for 1853 3 . M. Warszewiez 

 collected other birds, which passed into other museums on the Con- 

 tinent, and of which scattered notices have appeared. 



(5) The late Mr. David Forbes, the distinguished geologist, col- 

 lected birds in Bolivia, some of which are now in Sclater's collection. 

 He was the discoverer of the remarkable Grebe Centropelma mi- 

 cropteram* , upon the Lake of Titicaca. 



(6) Lastly, Mr. Walter Davis, who accompanied Mr. Alexander 

 Agassiz's exploring party to Lake Titicaca in 1875, obtained ex- 

 amples of six species of birds at Coroico, on the eastern slope of 

 Ulimani, as noticed in Mr. J. A. Allen's account of the birds obtained 

 during this expedition 5 . Most of the other species noticed in this 

 memoir, no doubt, occur in Bolivia as well as Peru, as Lake Titicaca 



1 Letter from Thomas Bridges, C.M.Z.S., addressed to G. R. Waterliouse, 

 containing notes on Bolivian Mammals and Birds, P. Z. S. 1846, p. 7. 



"Notes in addition to former papers on South- American Ornithology," by 

 Thomas Bridges, C.M.Z.S. P. Z. S. 1847, p. 28. 



a See Mr. Pentland's paper on the Bolivian Andes, Journ. E. Geogr. Soc. v. 

 p. 70. 



3 See P. Z. S. 1853, p. 61. * Ex. Om. p. 189, pi. xcv. 



5 " Exploration of Lake Titicaca, by Alexander Agassiz and S. W. Garinau. 

 III. List of Mammals and Birds. By J. A. Allen, with Field-Notes by Mr. 

 Garman," Bull. Mus. Coinp, Zool. Harvard Coll. Cambridge, iii, p. 349. 



