l-'il] Grinnell: The Modesto Song Simrrow. 199 



no. 7165 (coll. J. and J. W. Mailliard). November 30; no. 

 7175, December 17; no. 7183, January 17. It will appear most 

 reasonable, therefore, to assign these examples exactly as their 

 characters indicate, and to consider them individuals of maxil- 

 laris; not as mif;"rants, since the song sparrows of California, 

 with the exception of M. m. yy\oniana, are non-migratory in the 

 ordinary sense, but rather as stragglers invading a region not far 

 distant from their birthplace as a result of the fall scattering 

 movement. The latter consists in an emigration of certain indi- 

 viduals radially ; but no fixed lines are followed, and no definite 

 distances traversed. Individuals surviving the interim are be- 

 lieved to find their way back to some congenial locality near the 

 starting point. This annual phenomenon is well known to affect 

 even the most sedentary species and to involve birds-of-the-year 

 chiefly if not altogether, leading them to visit for a few months 

 in fall and winter regions not regularly inhabited by the species. 

 The type and a cotype of the new song sparrow herein de- 

 scribed have been presented to the California Museum of Verte- 

 brate Zoology by Mr. Joseph ^Mailliard. It has been through 

 his special effort that the type series has become available, he 

 having at the outset recognized the peculiarities of the form 

 represented. It is quite proper, therefore, that the new bird be 

 designated by the name chosen. 



Transynitteel Januanj 6, 1911. 



