332 Letters, Extracts, and Notes. 



with. It may interest readers of ' Tlie Ibis ' to learii tliat 

 Bolle already knew of the existence of a Blue Chaffinch in 

 Gran Canaria. I have published a short notice relating 

 to this fact (Orn. Jahrb. xxi. p. 225). 



I must thank you for allowing me to take up so much of 

 your valuable space. 



I am, Sir, 



Yours &c., 



Rudolph von Thanner. 



Casa inglisa, Vilaflor, Tenerife, 

 December loth, 1912. 



Sir, — Glancing through my copy of the ' Catalogue of 

 the Collection of Birds' Eggs in the British Museum,^ just 

 received, I noticed that two eggs from the Tristram 

 Collection, taken on '' Grand Mauan Is., Bay of Fundy," 

 are described (on page 262) as those of Passerculus princeps. 

 There would seem to be good reasons, however, for thinking 

 that they must have been laid by P. savanna, for this is the 

 only Passerculus known by American ornithologists to 

 inhabit Grand Manan in summer, while P. princeps is 

 unknown by them to breed anywhere save on Sable Island. 



I am. Sir, 



Yours &c., 



William Brewster. 



Cambricl{?e, Massachusetts, 

 December 12th, 1912. 



[The eggs in question, which came to the Museum from 

 the Tristram collection, were labelled and presumably 

 identified by Mr. T. M. Brewer, the well-known American 

 ornithologist, and as Mr. Ridgway, in his recent work on 

 the ' Birds of North and Middle America,^ states that 

 Passerculus princeps breeds on Sable Island and other 

 islands off Nova Scotia, there seems to be no sufficient 

 reason to alter or doubt the identification. — W. 11. O.-G.] 



