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SNODGRASS AND HELLER 



We have examined seven specimens of Geospiza fortis from the 

 southeastern part of Albemarle at Villa Mil, in a collection belonging 

 to Captain W. Johnson, of San Francisco, collected by Mr. G. M. 

 Green, of San Francisco. The bills of these specimens vary from 

 the G. f. platyrhyncha type to that of G. f. fortis. The following 

 are measurements made on these specimens : 



There are in our collection seven specimens of Geospiza fortis from 

 Elizabeth Bay, Albemarle. These resemble the Villa Mil specimens 

 in presenting a great deal of variation. Some have bills as large as 

 those of typical G.f. platyrhyncha specimens with strongly curved 

 culmens ; others are indistinguishable from ordinary G. f. fortis 

 specimens. The following are measurements of the Elizabeth Bay 

 specimens : 



These specimens undoubtedly bridge over the difference between the 

 former species G. fortis and G. dubia. 



6$d. GEOSPIZA FORTIS DUBIA (Gould). 



Geospiza dubia GOULD, Proc. Zool. Soc. Lond., v, p. 6, 1837. RIDGWAY, 

 Proc. U. S. Mat. Mus., xix, p. 518, 1896 ; Bull. U. S. Nat. Mus., 50, Pt. 

 i, p. 501, 1901. 



Geospiza dubia dubia ROTHSCHILD AND HARTERT, Novit. Zool., vi, p. 160, 

 1899. 



Range. Chatham, Barrington and Duncan. 



