ORNITnO LOGICAL CLUB. 57 



ming-Bird is found almost simxiltaneously over all the more inviting 

 parts of this lower country, and in certain sections where flowers 

 abound, as in the mountains of Eastern Arizona, their numbers far 

 exceed all other species put together. 



Tliough apparently so hardy, and though pushing its migrations 

 in spring in search of its summer home to a point attained by no 

 other species of its family, it yet in winter retires far south, and 

 appears to find the climate, even of California, too rigorous for its 

 endui-ance. Possibly, however, the winter flora is not suited to its 

 habits, and this may govern its choice of a winter residence, rather 

 than inability to live in a climate which appears well adapted to 

 its less ftistidious rival, the Anna Humming-Bii-d {Calypte ann<x). 

 However this may be, it is certain that the great proportion, 

 perhaps all, of the two species of Selas2)horiis leave our terri- 

 tory entirely in fall, and if any remain they are but a very limited 

 number, which take refuge in the warm interior valleys of Cali- 

 fornia. 



Below is appended a table of measurements of the two species. 

 The specimens of S. rufa are purposely selected from diff"erent 

 localities, and the measurements give a good idea of the amount of 

 variation : — 



The number given of *S'. alleni is less than would have been de- 

 sirable, and I regret that I have not at hand the large number of 



