Hv 
Vol. i,] 
to end of tail), wing 116-117, tail 43, the bare tarso-meta- 
tarsus 8'5 mm. 
Three adult specimens were procured at Pedroma on 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 {Choetura pelasgia), showing the growth of the 
nestlings at different periods of their advancement in age. 
lie 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 Tyrannidoi 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 palaeontological 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 wdll 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 gahketti, sp. n. ' • 
“ cf . Fronte nigro : pilco reliquo castaneo : hypochondriis et 
subcaudalibus pallide cinnamomeis. Long. tot. circa 
6‘4< poll., culm. ()’7, alae 4-3, caudai 2’55, tarsi 1*2. 
? . Mari similis. Alae 4‘4 poll. 
