"Vol. x.] liv 



to end of tail), wing 116-1 17, tail 43, the bare tarso-meta- 

 tarsus 8"5 mm. 



Three adult specimens were procured at Pedroma od the 

 island of San Thome, W. Africa, by Mr. Albert Mocquerys. 



Mr. W. E. D. Scott exhibited a series of interesting 

 photographs of the nests of the Spine-tailed Swift of North 

 America (Chaetura pelasgia), showing the growth of the 

 nestlings at different periods of their advancement in age. 

 He also gave some interesting details of the habits of the 

 species. The photographs had been rendered possible by the 

 removal of the sides of the chimney in his own house, so as 

 to reveal the nests in situ. 



Mr. Scott also contributed the following notes on three 

 new species of Tyrannida from Patagonia, specimens of 

 which he placed before the meeting : — 



" The descriptions of these birds, apparently heretofore 

 unknown, are based on material collected in Patagonia by 

 Mr. J. B. Hatcher. Mr. Hatcher was sent on a scientific 

 mission to the above region by the University of Princeton, 

 New Jersey, U.S.A. The study of the geology of the 

 country and the collection of palseontological specimens were 

 the chief objects of this expedition, but the collection of 

 about one thousand birds clearly indicates that the existing 

 fauna was in no way neglected. All of this ornithological 

 material is now at the Natural History Museum, South 

 Kensington, whither I have brought the specimens by the 

 direction of Princeton University, the British Museum being 

 the only place where adequate comparisons can be made. A 

 monograph in detail will be the ultimate result of this work, 

 and in the meantime diagnoses of such birds as appear to 

 be undescribed will be communicated to the British Ornitho- 

 logists' Club. 



" MUSCISAXICOLA GARRETTI, Sp. n. 



" <$ . Fronte nigro : pileo reliquo castaneo : hypochondriis et 

 subcaudalibus pallide cinnamomeis. Long. tot. circa 

 6'4 poll., culm. 0*7, alse 4'3, caudse 2*55, tarsi 1-2. 



a % . Mari similis. Alas 4*4 poll. 



