° 1914 J SwARTH, California Forms of Psaltriparus. 501 



their wanderings traversed what appeared to be quite well defined 

 paths, flitting from tree to tree, and along the same general lines of 

 travel, at pretty regularly recurring intervals, week after week, 

 throughout fall, winter, and spring. Of course it can not be proved 

 that these were actually the same individuals, but the impression 

 that they were was strongly conveyed. Other and similar corrobo- 

 rative evidence occurs to me, while on the other hand, as before 

 stated, I have no recorded observations suggestive of any migra- 

 tions by these birds. 



Bush-tits, in southern California at least, do wander in late svun- 

 mer to higher elevations in the mountains than those at which they 

 breed. Also the capture of birds in winter at such points as Palm 

 Springs, on the Colorado Desert, or at Victorville, on the Mohave 

 Desert, as recorded beyond, is undoubtedly due to their straying 

 from the nearby mountains along some favorable, wooded river 

 course, or similar attractive path. But these occurrences are not 

 indicative of any regular migratory habits, which, as stated above, 

 I do not believe to exist. 



Acknowledgments: The present study is based primarily upon 

 the series of bush-tits contained in the collection of the AIu- 

 seum of Vertebrate Zoology, being in fact partly inspired by the 

 desire to bring the Museum's catalogues into a more orderly and 

 consistent arrangement, as regards this genus. The Museum's 

 series, inclusive of the Grinnell, Morcom, and Swarth collections, 

 contains at the present writing three hundred and fifty specimens 

 of Psaltriparus. In addition to these a small number of skins was 

 borrowed from several other sources, illustrative of various impor- 

 tant localities not represented in the Museum collection. The wTiter 

 wishes to express his gratitude to Dr. C. W. Richmond, Acting 

 Curator, Division of Birds, of the United States National Museum, 

 for the loan of typical specimens of Psaltriparus minimus minimus, 

 and P. minimus calif or nicus; to Messrs. Joseph Mailliard and J. W. 

 ]\Iailliard, for examples of P. minimus minimus from several critical 

 California points; to Mr. William L. Finley, for skins from the 

 Oregon State Game \yarden's collection, and to INIr. Stanley G. 

 Jewett, for some from his own collection, representative of both 

 P. minimus minimus and P. minimus californicus from Oregon 

 localities. There were also available the specimens in the Los An- 



