44 U.S. NATIONAL MUSEUM BULLETIN 221 



Ridgway had, in fact, a number of specimens, both immature and adult, 

 but since he affirmed that the description was based upon a single bird, No. 

 16925, the others of the series can only be considered paratypes. 

 Buteo b[orea!is]. socorroensis Nelson 



Proc. Biol. Soc. Washington 12 : 7, January 27, 1898. 

 =Buteo jamaicensis socorroenis Nelson. See Peters, Checklist of birds 



of the world 1:232, 1931. 

 50761. Adult male. Socorro Island, Revilla Gigedo Islands, eastern 

 Pacific Ocean off Mexico. Entered into the museum register on April 

 24, 1868. Collected by Andrew J. Grayson. Original number 2. 



117499. Adult male. Socorro Island, Revilla Gigedo Islands, eastern 

 Pacific Ocean off Mexico. March 8, 1889. Collected by Charles H. 

 Townsend. Received from the U.S. Fish Commission. 



117500. Adult female. Socorro Island, Revilla Gigedo Islands, eastern 

 Pacific Ocean off Mexico. March 8, 1889. Collected by Charles H. 

 Townsend. Received from the U.S. Fish Commission. 



This name was provisionally proposed by Ridgway (Proc. U.S. Nat. Mus. 

 3 : 220, September 9, 1880) for the Buteo borealis var. montanus of Grayson 

 and Lawrence, not Nuttall, but was here not accompanied by a description. 

 No. 50761 was Grayson's only specimen and is accordingly the type of the 

 nomen nudum. Nos. 117499 and 117500, taken in 1889, bear the name 

 socorroensis on the labels in Ridgway's hand. Nelson's fortuitous valida- 

 tion of the name was based upon Nos. 117499 and 117500 or upon all three 

 specimens. Nos. 117499 and 117500 are, in any case, the birds from which 

 the first formal description was taken (Ridgway, in Biologia Centrali- 

 Americana, Aves 3: 64, November 1900) . 

 Buteo borealis funiosus Nelson 



Proc. BioL Soc. Washington 12: 7, January 27, 1898. 

 =Buteo jamaicensis fumosus Nelson. See Peters, Checklist of birds of 



the world 1 : 232, 1931. 

 156714. Adult male. Maria Madre Island, Tres Marias Islands, off the 



State of Nayarit, Mexico. May 13 (not 6), 1897. Collected by 



Edward W. Nelson and Edward A. Goldman. Original number 4379. 



Received from the U.S. Fish and Wildlife Service. 

 Buteo borealis, var. coslaricensis Ridgway 



in Baird, Brewer, and Ridgway, History of North American birds (land 



birds) 3 : 285, footnote 1, January 1874. 

 =Buteo jamaicensis coslaricensis Ridgway. See Peters, Checklist of 



birds of the world 1 : 232, 1931. 

 30409. Adult (sex not indicated). Costa Rica. Entered into the 



museum register on November 5, 1863. Collected by Alexander von 



Frantzius. 

 Buteo Cooper! Cassin 



Proc. Acad. Nat. Sci. Philadelphia 8: 253 (not earlier than October 28), 



1856. 



