April, 1918] The Ravens of North America 225 



eastern Arizona; San Rafael River, central Utah; Wells, north- 

 eastern Nevada; and Umatilla, central northern Oregon. 



Remarks. — This race is so much smaller than Corviis corax 

 principalis or Corviis corax etirophilus, particularly so far as the 

 bill is concerned, that no further comparison is necessary. It 

 was originally described by Doctors Rothschild and Hartert^ 

 from a specimen taken on Clarion Island in the Revillagigedo 

 group, and has been recently recorded by Mr. Ridgway- from 

 the Santa Barbara Islands, California. It is undoubtedly 

 worthy of recognition as a subspecies, but it has, however, 

 much more of a geographic range than hitherto supposed. Birds 

 from Lower California certainly belong to the same form ; while 

 those from California, Nevada, all but the coast region of 

 Oregon, as well as most of Arizona and Utah, are so very little 

 larger, though somewhat verging toward Corvus corax sinuatus, 

 that they are certainly referable to Corvus corax clarionensis . 

 No specimens from the coast region of Oregon have been 

 examined, and they also may belong under the present race. 



Measurements of specimens, including some of those from 

 the mainland of the western United States and Lower California, 

 are given in the table on pages 222 and 223. 



iNovit. Zool., IX, No. 2, July 25, 1902, p. 381. 

 2Bull. U. S. Nat. Mus., No. 50, part III, 1904, p. 265. 



