264 



SNODGRASS AND HELLER 



nine millimeters in length, and the culmen in the males is in all cases 

 greater than eighteen millimeters. In the specimens of males from 

 the other islands the wing does not exceed one hundred and thirty 

 four millimeters and the culmen is in all cases less than eighteen milli- 

 meters. No differences of color are appreciable between the two 

 subspecies. The difference between the males of the two forms is 

 such that they might almost be given the rank of species. The 

 females are more nearly alike, being in each case smaller than the 

 males. 



The subspecies was very common on Culpepper and Wenman. We 

 have seven specimens taken in December. 



MEASUREMENTS OF ADULT SPECIMENS OF NeSOfeUa 



galapagoensts exsul. 



Family FALCONID^. 

 Genus Buteo Cuvier. 



Biiieo Cuvier, Le9. Anat. Comp., i, Tabl. 11, Ois., 1800. 



Range. — Cosmopolitan, excepting most of the Australian region. 

 Galapagos Archipelago. 



45. BUTEO GALAPAGOENSIS (Gould). 



Polyborus galapagoensisGovi^n, Proc. Zool. Soc. Lond., p. 9, 1837 (Galapagos 



Islands). 

 Craxirex galapagoe7isis Gould, Zool. Voy. Beagle, lii, Birds, p. 23, pi. 2, 



1841. 

 Buteo galapagoensis Ridgway, Proc. U. S. Nat. Mus., xix, p. 587, 1896. — 



Rothschild and Hartert, Novit. Zool., vi, p. 174, 1899. 



Range. — Hood, Chatham, Barrington, Indefatigable, Duncan, 

 Jervis, James, Albemarle, Narboro, Abingdon and Bindloe. 



Closely allied to Buteo sivainsoni of North America, from which 

 it differs in the larger bill and feet. 



