1907 IV ] Thayer and Bangs, Another Hybrid Hummingbird. 313 



The original label bore an inscription to the effect that the speci- 

 men was to be recorded in 'The Auk' by R. C. McGregor, the 

 volume and page not, however, filled out. Turning to the volumes 

 of 'The Auk' we find on page 91, Vol. XIV, 1897, a note by R. C. 

 McGregor entitled "Broad-tailed Hummingbird in California." 

 Here the author mentions an adult male which he identified as 

 Selasphorus platycercus taken at Oakland, May 8, 1890, and in the 

 mounted collection of Walter E. Bryant. This is probably the 

 bird we have before us now, because there certainly was not a 

 specimen of Selasphorus platycercus in Mr. Bryant's mounted 

 collection from Oakland, and we believe McGregor made an error 

 in the date, giving "1890" for 1896. 



Mr. Robert Ridgway has very kindly examined the specimen 

 with much care and agrees with us as to its hybrid character and 

 probable parentage. 



All students of the Trochilida? well know how prone these birds 

 are to hybridize, and from California alone four different hybrids 

 are now recorded: 



Selasphorus floresii = Selasphorus alleni + Calypte anna; Tro- 

 chilus viola jucjul urn = Trochilus alexandri + Calypte anna; Tro- 

 chilus alexandri + Calypte costal (not named) ; and Selasphorus- 

 rufus + Atthis calliope (not named), the subject of the present 

 note. 



